My dad has had trouble sleeping the past few years, and I attribute part of it due to comfort. Your mattress seems promising. However, (although it may be affor

My dad has had trouble sleeping the past few years, and I attribute part of it due to comfort. Your mattress seems promising. However, (although it may be affordable for other) $400 queen-size is a heavy investment for us, so I would like to clear up some concerns first: 1. What do you think is main thing (comfort-wise) that distinguishes your product from the $200 queen-size foam mattress on amazon? What sort of feedbacks have you received in this regard? 2. You have a 30-days return policy. From my understanding, returning something like a mattress is extremely inconvenient. What are others' experience in returning your item?