Just curious what other people use as I'm in the market.  I've had bad luck with mattresses over the years.  I've tried a lot of stuff.  Foam mattress was the worst, didn't sleep well for the three months I had it.  Plush mattress hurt my back. The best sleep I had was on a super old and cheap mattress at a friend's house.  When I asked about it one morning I was so disturbed about how old it was and how many people had slept on it.  But still, was good sleep and had apparently cost $79 at some