BTDT
I bought the whole iComfort shebang and promptly returned it. The gel topper is a gimmick! It isn't gel and it doesn't dissipate heat. On top of that to get a comfortable mattress, read that as it's rock hard unless you get the models with multiple layers on top of the gel foam, you lose the supposed effectiveness of the foam plus it drives the price even higher, and it's not cheap to begin with.
We kept the adjustable bases and have been researching latex mattresses every since.
Now the really cool thing about Latex is that there is a standardized density rating system that allows you to shop mattresses between competitors once you determine the rating you like.
I like an ILD rating of 2" of 19 for the topper with a firmer 25-28 ILD underneath. That's soft enough to conform to your body to let you sleep on your side and yet gives you the firmness to allow you to sleep on your back.
The big problem with latex is mostly due to the places that sell it. Instead of explaining the rating system most just give it to you as soft medium & hard. In other words it's the new gimmick in mattress selling. If they can't blind you with brilliance, the try to baffle you with . . .
I could give a rats a$$ about it being a "green" material and got the man made material because insiders tell me that even when you order the "natural" material mostly man made is delivered because the profit margins are greater and the consumer can't tell the difference.
I've had both types in my hand at the same time and I couldn't tell the difference.
All the experts tell you that to get the full benefits of foam you shouldn't get a pillow top. I sorta agree with them because to decide for sure what I wanted I bought a 2" thick piece of 19 ILD and I tried it out over a variety of mattress base types. I thought I might just be able to buy the topper and put it over an existing mattress or a cheaper mattress. Wrong, it feels so much better over a latex core. It was raw & uncovered and we just put a sheet over it and it really needed more. The other latex mattress (it's a single layer 32 ILD) gave us the best feel (and we have memory foam & innerspring mattresses to try it on). 32 was simply too hard for either us or any guests who slept on it. The 19 made it so much better, but I still got a little back ache when I slept on my side on it.
In all of this we found that a thin topper material helped make the bed more comfortable and probably will make it more durable.
Everyone's gone to bed now so I can't get the info, but in the morning I'll post 2 links that appear to be the best 2 sources I've found. Read that as I haven't caught them in a lie. I've bought from both.
The iComfort system cost me $1,400 X 2 Twin XLs = King ($2,800)
The king sized 19 ILD topper cost me about $200.
The Twin XL 19/25 two layer zipper top mattress so I can adjust or change out the contents cost me...............drum roll please..............$485 each. That's a price I can live with.
It does pay to shop around and to educate yourself.
One thing you'll learn is that there is a huge difference in foams and Latex is far superior to any other mattress type out there.