EFI is a great thing, No adjustments needed. Coming off Doos all my life as well, last year was my first Polaris Sled, and the PRO RMK Rocks, best sled I have been on.
EFI is great and am glad to hear its a great sled. I wanted an etec but it seems like polaris sleds are more reasonably priced than doos and yammies. I will give it a shot. I can't wait to get it, hopefully in the next week or two.