Hi netengineer10,
While I don’t qualify as having owned an Ikea latex mattress, I can comment about the materials that they use and the question about durability.
Some comments about the Ikea latex line are in post #3 here. There is also more information that may be helpful in post #4 here.
I would personally not go with the mostly blended Dunlop latex version because it tends to be the least durable and adaptable version of latex and the extra price for more natural rubber content would be well worth it IMO.
While latex is the most durable of all the foams that are used in mattresses … the softer latex that is typically used in the upper comfort layers of a latex mattress will wear and soften faster than a latex core. This is one of the reasons that a high quality polyfoam/latex hybrid can be very good value because even though the polyfoam is not as durable and also not as adaptable as latex, the greater durability of a latex top layer can make the mattress as a whole very long lasting.
Of course even latex will benefit from the ability to flip the mattress and it will help an already very long lasting mattress last even longer. An additional consideration is that with a 6" firmer foam core … you can add a separate topper which can be replaced without replacing the whole mattress if it softens faster than the core and both the topper and the core can be flipped independently. Replacing a single layer is also an advantage of the zip cover DIY types of latex mattresses where single layers can be also be replaced if necessary without having to replace the whole mattress. The only “down side” of a double sided latex mattress (or any double sided mattress) is that there is a little more restriction on the construction and design because if there is too much soft foam on both sides of a double sided mattress the soft foam on the bottom can affect support while a one sided mattress doesn’t have this same restriction because the firmer foam will always be on the bottom.
While the Edsele would be firmer than most people’s preferences (it would be much firmer than a typical 2" or 3" comfort layer used for pressure relief) … if it fits your pressure relief needs (and of course your support needs but because of the firmness this is more likely) and your overall preferences then it could be a very good choice. If not … it would also be a good candidate for adding a topper.
So overall having a double sided latex mattress is not something I would be overly concerned about but I would certainly consider a 2 sided latex mattress as both a value and a durability bonus.
Phoenix