This is a great thread. I actually deal with a lot of the China stuff (buggymasters is a forum for the china buggies). Someone mentioned early on what the real issue is with the china stuff and that is in fact with the metal that they use. The just aren't up to par yet across the board. In buggy world what we have found is that quality varies widely across the individual manufacturers. There are a ton of china manufacturers that make 150cc buggies but only a few of them that are worthy of owning. The problem with this is that it takes a long time to identify the good guys.
To give you an example my friend bought a 250cc china four wheeler. It lasted ONE jump and when he landed the upper shock mount snapped right off. Again, cheap metal. On that same machine after we rigged the shock properly, next time we hit a jump, the strap that held the twin carbs in place broke and the carbs fell out.
In buggy world it is common to see metal parts simply vibrate themselves in half..literally, in a fairly short period of time. These are problems you guys won't see until you have owned them for a little while. Experience suggests that the issues (weak spots) with the machines will become evident by the time you have owned it for a year.
Regarding these particular machines, I have access to a direct importer of the original "Wolverine" here locally as well as the place you guys bought yours from having a distribution center here. The original machines were flat out Yamaha clones and were carbureted. Back to the cheap metal they were finding that a lot of the machines simply woudn't start one day. The problem wound up being that the metal fuel lines weren't holding up well to the gasoline and would produce a residue of some kind that would clog the main jet. This would require you to pull the carb apart and clean the jets until next time it happened. I know of at least one shop here that will have customers with actual Rhinos needing heavy service where they will get the china clone part as the replacement because in most cases it is a direct bolt-in replacement and a hell of a lot cheaper.
What's good about these machines though is that China has been doing it for quite some time and just like everything else, they will get better at it as time goes by. Are they to the point where they are making Japanese quality machines yet? No. In fact, Hell no. The pecking order for imported machines is Japan making the best quality, then Taiwan, then China. China is slowly getting up to Taiwan quality.
I am not sure how many different China manufacturers are making these new machines just yet but if there are not several yet, there will be in the near future. The key will once again be finding out which manufacturer has it together the best and there will be many people buying junk until it is figured out.
You gotta give these guys credit regardless because that is one of the better looking SxS machine out there with the balls to back it up. True reliability is yet to be seen but I would almost put money down that if you ride it hard it's not going to hold up for long. Could be wrong...