We had wondered the same thing. We've talked to a few couples who have been and the reports are mixed. I mean all had a good time, but from the sound of it, it's just a different dynamic, would be a mistake to think of it as Desire on a grand scale is one thing we were told. That makes sense to me as I don't think the Desire experience would necessarily scale well, the relatively low number of couples is part of the magic in my opinion. One couple told us that the self pressure was higher due to the sheer number of people. They felt rushed to make connections because you might not actually see a couple a second time, or if you did maybe they've connected with someone else.
Considering the high cost we opted for Naughty in Nawlins instead which sounds like it will deliver on the lifestyle / sexual side and is MUCH cheaper, but we shall see in July. Still it won't be Desire either, but it should be very naughty