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Gunnar_Zarncke comments on Open Thread Feb 29 - March 6, 2016 - Less Wrong Discussion
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No, but I've had some decent results with Sleepbot, which is much cheaper (free) if you have a smartphone already. Probably doesn't have nearly as good measurements as the mattress, and obviously doesn't make it adjustable, but it does seem to wake you up at a good time if you turn the accelerometer and microphone sensors on. (My smartphone broke, so as yet I haven't collected real empirical data on how well it works)
I tried SleepAsAndroid and they quality of the measurements is low (on my mid-range smartphone).
Less anecdotal: The German computer magazine did a comparison of many sleep Apps including a comparison in a sleep laboratory. Poor guy needing to sleep with all those devices in bed. The result was that the fancy curves as mostly way off the only reliable thing is start and end of sleep.
Here it is: http://www.heise.de/ct/ausgabe/2015-25-Schlaftracker-vs-Schlaflabor-2910003.html