Here is my 2 cents:
I think many people compare them to quads, which in reality they shouldn’t. Quads seem to be more forgiving to people who want to “ride and put away wet” for much longer. A quad is like the modern car, nice to drive, fast and low maintenance for sure. However, it is somewhat limited in hauling capacity, in field “repair-ability”, and arguably, off road abilities. An Argo is like a piece of heavy equipment, it is not as nice to drive (comfort I mean, not the fun factor), nor as fast. It does require more scheduled maintenance, but you gain ease of repair, hauling and work ability, and I would say off road ability.
I have both Argos and quads. I will even go so far as to say that Argo's can be problematic. They can leave you stranded. But in all cases this involves either something I did stupid like hitting a big rock at 15kph while looking at a moose or lack of maintenance.
In the area of maintenance, I find the biggest problem with Argos is related to chains and bearings. Keep those up, and you will have no problems. I have had my 05 Avenger for a year now. At first I would just hop in it and go. Almost every ride I found something wrong with it. But every single problem I have had is a result of something to do with chains or bearings. I have never been stranded because of those issues in that I was always able to get back home, but those are the only issues I have had while riding. I changed most of my bearings out and put new chains on, and have had no problems since.
FYI, new chains and bearings was something I could easily do quite easily and I think I spend about 500-600 bucks to refit my drivetrain, whereas when my tranny in the Quad was acting up, the repair bill (under warrentee thankfully) was almost 4k.
Finally, I have had half an Alaskan/Yukon moose on my Arctic Cat 500 quad, and hated life coming out of the bush, at 11pm, in the rain, and winching every 10 minutes. Same conditions, the next year, I had a whole moose and 5 guys camping gear in my Argo, top on, heater on, puttin along sipping “coffee” at 6pm because we weren’t getting stuck every 10 minutes and loving life.
Derek