I like the idea of this app, but the only bad thing about it is that I couldnt listen to White Noise - an app that helps me fall asleep faster - and run this at the same time. The other thing that I dont like is the fact that the interface was hard for me to understand at first. Why cant you just press record to record?
All together a very nice app, but I dont think that it is worth $2.99.
DabAppReview about Night Recorder