Very good bed, definitely would recommend
I've had this Serta Blue 100 Gentle Firm for about a month. One thing I have noticed is that I definately sleep a lot better. It's quite firm, but provides enough support and cuddling for body curves, whether you sleep on your back or your side. I toss and turn a lot less, but I can't stay in one position for very long, otherwise my hips start hurting. My husband sleeps good on the matress also. He wakes less during the night and isn't tossing and turning. He prefers a softer bed just like me, but we both sleep better on the firmer bed. We don't notice the cooling effects of the bed, but that may be because we have a mattress protector on it.