We bought two mattresses, one firm and one plush.
We bought two Twin XL I comfort blue Max 1000 TXL mattresses with fully adjustable and vibrating deluxe foundations. We have them together (side by side) to make on King. After trying them out in the store, my wife wanted the plush, I wanted the firm. We replaced a Select Comfort (Sleep Number) mattress that we had had for 23 years. We wanted a change and also wanted something adjustable that would vibrate but we wanted to be able to adjust the mattresses independently. We have had our new bed(s) for six weeks now. My wife slept on the plush for two weeks and then we switched mattresses. After just a couple of days, she wanted her plush back. She rates it an 8 out of ten for sleep, comfort, etc. I tried the plush for a couple of days, and liked it, but prefer something a little more firm. Our previous Select Comfort bed had a 2" gel foam topper, so we are used to the cooling effect of the gel foam on our new mattresses.