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.

This is the only mattress I’ll buy. Bought one for every bedroom in my home. Whenever a guest stays over they always ask me what brand of mattress i have.

Bought the Beautyrest Black Series Three Medium Firm Pillow Top mattress. It is comfortable and supportive. Note that it is 16.5 inches tall. With the 5" low profile foundation and a standard 8" tall bed frame, the bed is 30" tall. Had to exchange the low profile foundation for a 1.5" platform foundation and returned to a low profile 4" tall bedframe to make the bed height a reasonable 22" tall.

Probably the most comfortable mattress I’ve slept on in a very long time. I toss & turn & this mattress has all but stopped that dead in its tracks. The absence of motion transfer is the cherry on top for my wife. I would recommend this mattress to everyone.

I purchased this and was supposed to receive a $400 gift card after numerous attempts and no gift card id like to say it’s a great mattress with false advertisement no gift card still

Tried the King 4 black series and didn’t care for it. Dropped down to Black series 3 medium and feels better but very hot mattress. Thought cooling would be better.

Excellent mattress with incredible support and an unmatched level of comfort! We had Purple and Tempurpedic mattresses in the past and we are quite impressed with the comfort and quality of the Beautyrest.

This black series 3 medium pillow top felt amazing in the store and feels even better in my bedroom. Though it's heavy it has handles. Has made my bed really high but it kinda feels like I'm sleeping on a cloud anyway. Only 3 days in but I'm loving it.

Is not like the showroom floor. It sinks so much and so hard to even get comfortable. Seems like the bed is uneven and just bought a few weeks ago. I made a mistake sending tempurpedic back for this one. This bed wont last a year. I regret the purchase so expensive.

It was good the first 2 months, after that it started sinking in the middle, giving me back pain every night, can rest properly on this mattress, and yes i spined it once a month, try sleeping at the edges nothing helped. Unfortunately couldn't return, big waste of my hard earned money