has anyone ever used the babymoon pillow? thoughts?

http://www.amazon.com/BabyMoon-Pillow-Flat-Syndrome-Support/dp/B0049YNRCG/ref=sr_1_1?ie=UTF8&qid=1350618773&sr=8-1&keywords=babymoon

dd is starting to get a flat head and i'm considering getting her the pillow. the pediatrician says her flat head is very minimal and nothing to worry about, but i'm afraid it'll get worse! i've tried various positions, but she always ends up flat on her back in the middle of the night. she's doing her tummy time during the day and starting to sit in a supported chair more. any thoughts? suggestions?