I have 1500 miles on mine, but it's a 600. I just love the sled. It rides so nice and has absolutely no ski lift. The new rear skid eats the bumps up so much better than my 2012. The IDD gauge with built in GPS is awesome to be able to get from the factory and the LED headlight at night is a huge difference. My only issue is I have a little darting on a hard pack trail with just a few sleds down it. If I'm first down the hard pack trail, I'm fine, and once several sleds have been down and the top of the trail loosens up, the darting also goes away, so it's a very narrow window. I only have the standard 4" factory carbides on right now so I'm looking at upgrading there.
All I can suggest is try to ride one. If you can't, you won't be disappointed. I couldn't be happier and it gets better every mile. Everything I hear about the new 800 is it's a monster from 0-80 and corner to corner. It's still early, but not hearing any reliability issues either with some sleds with over 2500 miles on them.