i work on ATV and UTV machines every day, i ride them, test them, use them for what they are intended, and try them out at things they are not intended for. this is personal opinion and not brand bias by any means. i do not own any current machine on the market, i do not pay a note to any brand and i have zero brand loyalty to any of them.
personal opinion is that they teryx is one of the least likely that i would buy. (1) its not that comfortable, its not that roomy with the huge console between the passengers and if you go with a 4seat the rear foot room is young kid appropriate only. (2) its quite bland, there isnt much flash and flare (3) its one of the worst if not the worst to work on. i absolutely despise having to work on one for multiple reasons but all in all, they were not built to be worked on. (4) having to reach down outside the cab and unlatch the door really sucks when you are inside the cab. the old rhino was the same way, i dont wanna have to lean down and fiddle for a handle thats on the outside of the door it reminds me too much of the chevrolet pickups and people having to reach outside to open the door. they ride somewhat plush, their 4wd is ok, and their price is almost half of what some of the big guys are asking for their top of the line rigs (5) the in cab heat isnt that great with the engine right beside you. i have often times seen clutch intake tubes melt because they run right beside the engine, it gets HOT under that plastic shroud
commander is a decent machine, very well built, they ride very nice and steer and handle nice. dump bed is easy to use. the engine and trans and driveline will outlast pretty much every other machine on the market. getting in and out of them is super easy if you just pull the nets off. however (1) the 4wd is a 3wheel peel (2) the stock clutch is the worst design on the market and average belt life with a beginner rider is about 60 miles (3) putting a belt on one is a 45 minute to an hour job for a beginner (4) its not the easiest to work on but when you pull the plastics off you can see everything (5) in cab heat is a fair bit more than most would like.
for ease of in and out, and usability and workability, the can-am defender and polaris ranger are way better for getting in and out of for a bigger guy, seating position is nice, the ability to go anywhere and use for work, these two are the top dogs. both are available with top of the line 4wd systems, optional nicer seats, power steering, with or without factory doors. best part is if you get the factory doors they have a latch inside and out so you dont reach out of the machine to open your door. If you have an arctic cat now textron dealer local, you could look into the Textron Havoc, i havent actually seen one just the demo videos and pictures but it appears to be a more powerful and nimble version of the polaris ranger and can-am defender. no clue about its durabilty or life expectancy but if i was in that market for a machine i would be looking pretty hard at the Havoc