The effective sleep surface is only the middle 2/3rds of the matress. The outside 1/3 slopes downward, and wants to roll a back sleeper off the side.

Hopefully gets some good night sleep

Good ,not sure after a year or years, but so far it's pretty good for me for 3 months

Amazing, supportive, quality mattress.

Just got the mattress and pillows today. Still allowing it to air.

The most comfortable Masters I’ve ever spend time on!

My wife got medium I got the firm with adjustable beds we love them.

Love it! It took a couple of weeks to adjust to the new bed but once I did it was awesome. I would recommend this to all.

First one came defective (all pillow top moved to one side). Replacement is fine but husband does not think it’s comfortable.

Replaced a world class mattresss from 9 years ago with the series 4 black and have never had a better night sleep!!