Had one and I liked it once I got it to run the way it should. It appears by the new owners that kubota has dealt with those issues. I was an early buyer, so this stuff can happen.
Other than that: It's not fast. 25-30mph tops. It will climb a pine tree in low range. Plows snow like crazy and will haul and tow pretty much anything in it's range.
It's a work vehicle, not a sport UTV. So it really depends on what your intents are. If you want to work around the property and go for putters in the woods, it's great.
The 500 is built like a tank and it's smaller size is great for general use and riding on quad trails. All and all I was happy with mine.