"We came into a bit of extra money and decided to get a king sized mattress, so we looked at Sertas and other brands but they were really expensive and we'd have to deal with salespeople and just the usual stuff that makes shopping for beds ****.
We looked at reviews online and a lot of people said the fancy expensive foam mattress were no better than less expensive ones that people bought online, so we went for it and got a Novosbed mattress which was well under half the price of the ones for sale in a store.
Anyway after owning it for a few months my wife and I are super happy with it. My aches and pains from sleeping have gone away and we both have tons of room and aren't affected by each other flipping around to reduce the soreness.
I'm a big huge guy at 6'4" and 400+ pounds so I was worried about taking the gamble on a mattress that might not handle me, but the medium mattress was perfect, we didn't need to get a topper or anything, everything is supported nicely. It doesn't get hot or smell bad, it's been frikking awesome being able to sleep in again and not have to get up because of being sore."