Ive used it every night since I first downloaded it.
Its difficult enough having sleep apnea and sleeping with a CPAP mask every night, so having this app has been immensely helpful not only from an analytical sense of being able to accurately record my sleep patterns, but the alarm helps my sleep feel MUCH more restful because it goes off at the best time based on your being in light sleep state. It really works!
Whats especially helpful is when I do feel like I didnt sleep well in the morning, the app accurately reflects that too. It really is awesome for analytical use and just in general for getting a better nights sleep.
YoshiFD3S about Sleep Meister Lite