Ever since my friend turned me on to this app, I am addicted. I have issues with insomnia, and there are particular tracks that seem to cure that. I also recently started using the wake timer as well. It helps me wake feeling refreshed and positive about the day ahead. The tracks have incredible quality. My only advice is that, if you are going to use the app for sleep cycles, buy a set of earphones like bedphones which you can bend to match the back of your ear. I feel like I am in heaven every time I use this app. I struggle with anxiety, and this has helped me soooo much!