RePose was a great way for me to get basic information on sleep position, as I am someone who suffers from periodic neck pain. This app is easy to use, theres great information within the app and on the Proximal Box website to get you started. I was definitely a bit skeptical of the ease and comfort of wearing my ipod touch, but it was far simpler than expected. As long as you arent a stomach sleeper, wearing your ipod or iphone should be pretty easy. The ipod fit in my money belt perfectly. I put it on, got the ipod set up with RePose, and went to sleep. In the morning I had a really nice little graph showing how I changed position during the night, and a summary of total time on each side and on my back. I did not use the alert feature since I really just wanted the information, so cannot comment on that, though the gradual increase in alarm volume seems like a great feature to help people change their sleep behavior. Definitely recommended for anyone with sleep problems, or for people who are just curious about how they sleep.