Not anymore. We had one back in the 70's; it lost its charm after awhile. Every time my husband rolled over, it was like a tidal wave on my side :)
I used to have them but haven't had one in over 20 years since the last one popped a hole in it in the middle of the night. Comfortable beds but No Thanks !
Never.
I used to have one! It was great! Especially when it was cold outside....turn the heater up a bit, toasty warm!
Back in the 80s
I had one about 25 years ago.