My more recent sled history: 2007 Yamaha Attak, 2008 Polaris Switchback 700, 2010 Renegade Adrenaline 1200. All purchased new.
I'm keeping this 1200 for a while, it is SOOO much better than the other 2 sleds were. And my brother test-rode mine for a while and he's preparing to snowcheck a 2014 1200 Gade X because he liked mine so much...
I've currently got about 4000 miles of very aggressive UP trail riding on my 1200, and probably 15% of my time doing off-trail powerline/pipeline playing in the UP. It does very very well. ESPECIALLY on the trails. As stated, its OK for boondocking, but not great. Frankly I think it's even a little better than the Switchback was though, but only after I made a few mods.
As for reliability problems, it did leave me stranded one day with electrical gremlin 2 years ago, random shut-offs while going down the trail...about 30 shut-offs in 10 miles. In the end I finally found the problem...a loose ground bolt. Tightened it and never again had a problem. And this year I found a minor coolant leak. Tightened a hose. Fixed. I've been beating the snot out of it too. And some mods. Aftermarket Powerblock 80 clutch (the 09 thru 12 TRA clutches were not good on these machines, but seemingly resolved with 13 and up E-drive clutch), I also have a header to add about 10 hp and I've gutted/modded my factory muffler for more flow, and changed to a Cobra track and Slydog Powderhound skis.
It likes the mods and it rips. SNEAKY quiet and fast. Zero to 80 it's the fastest sled I've ever owned, pulls like you would not believe. Hits between 100 to 110 on speedo consistently on railroad grades and packed lakes without breaking a sweat (assuming good conditions). Gets between 12 and 18 mpg depending on how seriously I beat on it all day. Smooooth. No vibration. Remember the silky pull of the 2 stroke triples? The 1200 is indeed a triple...and an even smooooother and quieter one than any of the previous 2 stroke triples were. Never drinks a drop of oil, no odor, no smoke, no reason to even open a hood or side panel on a typical 1000 mile trip...gas and go, with the cheapest 87 octane ethanol blend I can find...it doesn't care. Change the oil once a year at home on a beautiful spring day and ignore it the rest of the year. Starts right up after sitting out during a -30 degree night.
The engine is a rock. Go on Dootalk and get more info. I am very active over there, and I recall reading of ONE engine failure on a 1200. Just one. And even on that one, with about 4K miles I think and a full 1.5 years out of warranty, Doo stepped up and provided parts for free...owner only had to pay labor.
Now start looking at Dootalk for 2 stroke engine failures and read for pages and pages of complaints...
Obviously No sled is totally trouble-free. Seems some of the 1200's suffer from a few electrical gremlins...a few stators and wiring issues. But these complaints seem to be very rare. There were some minor growing pains with the 2009's (first model year, and it was mostly a few bolt-ons like water pumps...not the engine iteself), but after that they redesigned a couple things and they've really been solid ever since.
I just can't say enough good about it. I'm still on a 2010 model, and the 2014's were just introduced. If I were forced to buy a new sled today it would definitely be a 13 or 14 Renegade 1200 (identical, they didn't make a single change between these 2 years)...i kinda think of it as the BMW 5 series of snowmobiles...or a Cadillac CTS-V maybe? It's just smooth, quiet, high performance thrust and flat-as-rails cornering...the ultimate luxury muscle-sled. It'll lose to the 800's in a top speed race, but otherwise I feel it's just as strong as they are zero to 80. Motor-wise I consider it to be a strong 700 class sled, if you were to compare to 2 strokes.
Incidentally, this motor BEGS for a long track. I think it doesn't belong in a shorty at all unless you never want to hook up and get traction. Just way too much torque. Get a Gade, or the 137" GSX luxury version (SE or LE I can't remember?), or even a 2-up if you really want the power to get to the ground.