I have a firm posturepedic mattress so I got the 1 inch sensus mattress topper to make it more plush. The one inch is PERFECT if not a bit of an overkill. I wish it were a little denser or thinner so my mattress can retain its firmness. The one inch sinks in a little, but it's not too noticeable. It makes my firm mattress feel like a pillow top. Definitely recommend if you like a medium firm to medium bed. But if you're like me and prefer a firm bed, I'd probably go with something denser like the venus 1 inch.