FSMike - We have a latex mattress from HMC Mattress, and although they are a great company, the mattress is absolutely miserable to sleep on. I don't know if it is the latex or the way this particular mattress is put together, but neither of us can get a good night's sleep on it. Both of us wake up almost every night (sometimes several times) with one of our limbs completely numb -- a whole leg, a whole arm, both hands. It is the pits.
It was the one addition to the boat that we made before cruising full-time that I really really regret. The company has offered to fix the mattress, but they are in California
and the boat is on the Guatemala
border - no way to get it to them. We vacillate between wanting to pitch
the darn thing overboard
and just putting up with sleepless uncomfortable nights. We don't have the headroom
to put a topper on it.
So before you get a latex mattress, I would heartily recommend going to a showroom with a blanket and a pillow and taking an hour's nap on one if you can get away with it.
The one good thing is that it is not hot to sleep on. We have a memory foam topper in the v-berth (where we both end up on many nights), and it is hot and sweaty in the tropics...