We ordered a memory foam mattress over a month ago, which was finally delivered yesterday. The mattress is firmer than we thought it'd be, so we were curious on how we'd feel today. We ordered it through Costco, so we didn't have a chance to try it out before ordering.
The good news is that when I got out of bed this morning, the first thing I noticed is that I felt less stiff and my back isn't nearly as sore as usual. It's a very noticeable difference and naturally, I'm quite happy. My wife also reports no issues, which is great. Last time we picked up the cheaper memory foam mattress at Costco we had to return it because both of us were sore after a couple of days.
The only downside is that I noticed the same mattress is now $200 cheaper on Costco. Bad timing on my part, but no regrets, even if I paid full price. Less back pain and soreness is priceless.