I have an 09 trooper and I have done a lot to it. Honestly its been pretty dam reliable!!!! few issues here and there but you will have that with anything. I ride with guys that have rhinos rzrz and quads and at some point they have all been stuck. I live in MA and I go to NH a lot with mine. I do a lot riding 20mph and under and up in NH 40+ mph. My friends call it the redneck tow truck cause I am the guy that gets people unstuck.or the beast. The factory airbox sucks do yourself a favor and buy or build a snorkel and change all the fluids they tend to put the cheap shit in them. Theres a lot of info here and these guys are awesome on this site!!!! I think for the money you get a lot with the trooper I have looked several times at an rzr but I cant stomach the price tag and I dont care for the belt drive on them. Everyone has a different style of driving and lives in different environments so just cause one guy has an issue doesn't mean you will.
Just my opinion i have had mine 3 years now I think and it has 1300 miles on it and only left me stranded once. GOOD LUCk
charlie