Also was going to buy, but opted for a very cheap MP3 player ($12.99), $.99 brown noise song (74 mins), and used my iHome portable speaker (~$20)-all from Amazon. Cheaper and I can use the things separately when I want. My husband does have to turn it on when he gets up, but no biggie.
YouTube has a video of all the sounds. I used to have a downloaded loop of sounds from iTunes too but I could hear the distinct fades in and out from the end of the loop to the beginning. If you're not sensitive to that, fine - but for those that are sound invest in a good sound machine.