After 3rd visit to the local Sleep Number Bed, we agreed to purchase a mattress with Flex 1 base. After discussion of 100 night trial, we closed the deal and reviewed the paperwork. I was asked to initial a few items which included: ALL FLEX BASES ARE NON-RETURNABLE! What happened to the 100 night trial? Why does Sleep Number hide their warranty even as I've asked to review it in my previous visits to the store. I hope we won't have any problem with the mattress or base. But slick sales practices will not get you any referrals from us.