Hi Dino,
There are many different types of gel memory foams coming to market that use different methods of combining memory foam with gel material. The broad differences between them are in post #26 here. Some of the details about the foam are in the attachment to post #1 here as I believe that the foam that Tim is using is the same type of foam (he can of course confirm this). This type of memory foam and gel combination is IMO one of the “best” methods of combining the two as it apparently strengthens the polymer matrix structure of the memory foam itself rather than weakens it.
Of course as with any new material, the coming years will provide much more accurate “real life” feedback about all the different types of gel/memory foams coming to market … but at this point I believe that this type of infusion has the best odds of being the most durable of all the combinations.
Phoenix