WithingsSleep - Sleep Tracking Pad Under The Mattress With Sleep Cycle Analysis

Ok, I do not ordinarily write reviews unless I am very impressed and this sleeping mat really impressed me. I have tried a variety of sleeping mats/sensors in the past and the single biggest problem with them all (other than this one) is that they require you to use your phone to record the sleeping data. With other mats, you need to remember to open an app on the phone and you need to store all the data on your phone, which gets very annoying after a short while. Not with this mat, the sleeping mat communicates with Withings directly over wifi and all your sleeping data is stored on their website. Your phone is just used to view the data whenever you want, you can delete the withing app from your phone and it will not erase the data. The other important thing about a sleeping sensor is the accuracy, a sleeping mat/sensor is no good if it is not accurate, and this one is meeting my accuracy standards. You do need to be careful where to put the sensor (they say under the sternum) but once you do that, then you don't need to worry about placement ever again, or even need to think about the sensor ever again. It just records your sleep every day without you ever having to think about it. This point is not to be under estimated, I have 10 years of daily weight data stored on the Withings website, because I use their weighing scale. And no, I am not giving them 5 stars just because I own their weighing scale, I would simply not bother writing a review if I was not truly impressed with the product. I am going to come back and update this review after 1 year, the true value of a good sleeping sensor is in being able to consistently produce a good measurement every day.Update after 1 month:1. Robust: I have used it for a little bit less than 1 month now, and I have a reading from every day. This is a first for me, my previous sleeping sensors never made it so far.2. Accuracy: Accuracy is not super good but not super bad either. If you lie still in bed and do not move, this sensor will put you down as "REM", and the other deeper sleep settings can be fooled too. I think i have to leave the bed or sit upright for it to think that i am awake, otherwise it thinks that i am asleep. If the sensor is able to measure my heartrate and i don't move much, it has me down as asleep. Not complaining to be honest, I am not sure how much better someone else can do either.3. Speedy reading: Typically i get the results as soon as i get out of bed, within 5 mins. On a few occasions, it has take longer. Sometimes as long as 6 hours. I think the sensor tries to connect to the website, if it is not able to connect, waits for a few hours before retrying. Not sure exactly what happens in the few instances. But I have always managed to finally get a reading from the previous night, even with those delayed instances. I see a lot of negative reviews and I feel that this could be a cause of concern. When you don't see the results right away, you get nervous that the sensor could be broken.4. Five Stars: Yes, I still give this product 5 stars despite everything. Competitors take note, this is the first time that a sleeping sensor has been able to track my sleep for as long as a month, and the data is stored safely in Withings website. I don't think any other sleeping sensor competitor can say they do as good a job, including the mighty Apple. I am afraid that making a good sleeping sensor is so hard, that people might simply think it is not worth the effort.

I love Withings products and I would say that I've tried quite a bit of them. This product at first I was wondering how it was going to work since I have a Queen mattress and was cautiously optimistic about its' performance. As soon as I plugged it in and went through the prompts on the app, it took only a few minutes for the tracking pad to calibrate to my particular bed and from that point on it's worked amazingly.One word of caution: When you first put it through calibration-- you're going to want to not sit on the bed or have anything on the bed really for the next ten minutes while it completes calibration, that way its going to be absolutely accurate when you finally lay down to sleep. It even tracks potential naps that you might have which is a definite plus!

My Withings Sleep mat is back in its pretty box and ready to send back to Amazon before the 30 day return window expires. I tried very hard to make it work, and 30 days was not enough.As many other users have reported, I saw an initial ten days of believable sleep data reported on the iPhone, and a subscription is NOT required for that.On the eleventh evening, we both laid on the instrumented side of the bed for a while. That night, the sleep report showed missing hours of sleep. The next night showed only a little sleep. The next night showed no sleep at all.I lept into test engineer mode. The home router showed the Withings Sleep mat was 'off' and had no IP address. Hmmm.I set up a wifi access point on my laptop to wireshark it. The first night was misspent with the mat asking for DHCP from a wrong DHCP server ip address and getting rejected. What I do not know of networking fills many books, but the next night I got lucky and captured traffic.When there is no sleeper, the mat remains quiet. When a sleeper is present, from time to time throughout the night, the mat uses DHCP to get a new IP address, uses DNS to find ws.withings.com, sends TLS3.1 encrypted traffic, and releases the DHCP lease. Inscrutible.I considered the acoustics. Ballistocardiography measures the recoil of the body when the heart shoots blood downward. According to a 1951 pdf, "MOTION OF THE THORAX DURING THE HEART CYCLE", q.v., the thorax converts head-to-toe signal into dorso-ventral and lateral signals, both equally at about 40% strength, and the best signal is opposite the xiphoid, or bottom of the sternum.My mattress is a 73" wide Ikea Myrbacka, 3" of memory foam over 6" of other foam, and very heavy, on a slatted bedframe.The signal is a time varying scalar, and the mat bladder is like an eardrum, so I created a soundbox around it using two 2x4 foot thin plywood sheets sandwiched with 3/4" sticks on the two long sides, and a further 1/4" taken up by papers to leave the mat in about a 1/2" space minus whatever the plywood sags.That night I also discovered the Withings App checkbox [x] "Increase Sensitivity", and it captured the sleeping partner in the absence of the targeted sleeper. So I reduced it to 2x2 foot.I also know that many firmwares run a while, and fall over. So I added a smart outlet to cycle power to the mat daily at midday.I considered to place the mat above the mattress, but my wife would not lay on it. I also considered to slice the mattress foam to embed the mat in it, but my wife would not allow it.In a last ditch effort to see success, I did a factory reset and placed it under only a pillow under my thorax, and it captured only intermittent data.Valuable diagnostics can be had from the Withings.com login, and from a free IFTTT.com account. I easily created two applets there to send email upon in bed and out of bed events. In one night, I counted 143 each of in-bed and out-of-bed events!Reviewing the online sleep data, there is no sleep recorded for any evening hours before midnight on any night except on the fateful eleventh night, neither before nor after that day, but the iPhone does correctly show sleep both before and after midnight.I cannot fathom the failure mode, but with 50% of 5 star reviews and 20% of 1 star reviews, Withings had better try to solve it.The next shiny thing in my sights is a Google Nest Hub Gen 2 with a radar chip to detect sleeping, and I already installed a free SleepScore App to try out.

I have been looking for a sleep tracking option that isn't a wearable. I cannot stand to wear a watch or ring at night and this is the perfect solution. I forget it's under there and so I don't constantly think about how I'm sleeping during the night when I wake up. I've been using it for about 2 weeks and I really like the data. It is accurate and exactly what I was looking for.