Hi dschonew,
The Terra is their newest model and is an all natural Talalay latex mattress which would be very different from their other mattresses which are memory foam mattresses. You can read a little more in post #2 here about some of the differences between latex and memory foam but the best way to really know the difference between then would be with some local testing on each material so you can find out which one you tend to prefer. They are quite new and I don’t think there is any feedback on the forum about them but the people at Novosbed are very knowledgeable about all their mattresses and would certainly be able to answer any more specific questions you may have about it.
Phoenix