I own latex from Foambymail. I received my mattress last week, it consists of a 6" firm (33-38ILD) and a 3" medium topper (26-32ILD) . Like most here have mentioned, I have no idea where the foam originated from (I asked and was told "international", so I asked if they meant Latex International and she said "yes"). I know that the foam is not from Latex Internatinal (no serial or form number, no ILD rating) but that was not terribly important to me, they have a 30 day guarantee and the price was right. I would definately recommend the terry cloth cover, very soft and you can get up to 9" in it (not a pleasant experience, but it can be done.) Supporting myself on one hand, I can feel the floor (I have it laying on the floor at this time, until I am sure that I am going to keep it, I am not going to buy a platform bed.)
I am experiencing the same issues that haysdb is experiencing, it seems that my butt is settling lower than it ought to and it is starting to cause some back pain after a week of sleeping on it. I am not sure what is going to prevent that, sending it back would be extremely cumbersome, I am only a couple of hours away from the store, so I may drive out there and see what I can do. I am a big guy, so maybe I will order another 2 inches of firm and lay it on top of the medium. Unfortunately the firm is the highest density that they have.