I have been using this mattress since September 2020 and didn't realize how poorly I was sleeping until we switched to this mattress.  The first 30 were painful since I didn't realize how poorly my body was being supported by my old bed until it was well supported with the Beautyrest BR800 Firm mattress.
I feel so much better now!  The firm is VERY firm and comfortable.  I feel well rested and have more energy since I'm sleeping better.