I have the 600 efi Tundra. I love exploring and mostly alone. This baby is able to crawl throu anything. It is super nimble and easy to sidehill for newbies and ok for trails. You loose high speed ability because of this, but who buy a narrow sled for high speed cruising anyway. Me and my missy ride together on the small seat. Were not fat people, so there is no real problem. Just slow down, thats all. Never any good for anyone to blast throu bumps ans what not.
Easy on fuel, I hear. Compared to the E-tec, its a pig. Mye computer say 2.5 liter/100 km. I ride slow and steady for ok fueleconomy, but for being an efi, I am dissapointed. Cheap to purchase, thou.