I have found this app to be incredibly helpful. I have purchased several of the sessions for different things and find them all easy to listen to and follow, while challenging enough to be assured that I am achieving something. The additional feature of the Mindwave headset adds the confirmation that I am doing it properly which is something I usually find difficult with most meditations. I had a slight technical problem with one of the sessions and, on contacting the creator of the app, I found him to be a genuinely caring person, dedicated to helping people with his product. He was even willing to put himself out of pocket to ensure I ended up being able to benefit from the app, which most would not do these days! I could not recommend the app highly enough, and others by this person, and have found it to be one of the best apps for use with the Mindwave headset.