I don't think the MT is more stable, per se. It is a more compact design along the roll axis than the "classic" stacked frame helis, so its control response is more direct, which just makes it more predictable, and yes, easier to fly.

Pros and cons I don't want to get into, really- there are enough religious wars about my heli is better than yours -but the MT has just impressed the heck out of me and the folks I know that have bought it. I was on the edge of buying a v2 TRex, but tried the MT instead and I'm a total fan. Others I know who have various versions of TRex have tried it, and all compare the MT favorably to the TR. When the MT costs a fraction of what the TRex does, flies well, and is easier to maintain....