My back hurts every morning!

We have had exactly the same experience as the first reviewer. We slept on this bed in a Hilton Garden Inn and loved it. We bought it about a year and a half ago, and have has issues with it ever since. There is a huge "hill" in our bed, even when both of the dials are set to the same number. My husband's side is over-inflated and won't go down, and my side won't inflate, so I am sleeping in a hole. Customer service has replaced some of the tubes and dials for us, but I definitely feel like we have a defective mattress, because nothing seems for help. Now Natural form is telling me there is nothing wrong with my bed, and I cannot return it. I have made at least 10 calls in the past year & a half complaining about "the hill", and they still won't help me. VERY frustrating!!! I don't recommend this bed to anyone, because you will spend a lot of money on a mattress that you will be stuck with, no matter if you get a good one or a lemon.