We bought a Sealy Wysteria Lane mattress in January of this year (2009) from Mattress Discounters. We were having problems with it dipping in the middle so we contacted Mattress Discounters in May and they arranged to exchange it for a new one. We have had the new mattress now for less than a month and it's doing the same thing, dipping in the middle. I have not had a good nights sleep on this set, it feels like I'm sleeping on a pile of large rocks. This was the worse $850 we ever spent. Please do not buy a sealy mattress as they... read full review »