I own 3 at the moment and really like everything about the machine except the turning radius. Here are some videos of mine
http://www.youtube.com/user/ejmacsv250?feature=mhum The blue on was set up with a 30mm pumper, aftermarket header and Big Gun pipe, uni filter, and 11g rollers which was great for that area cause you could mash the gas and break the rear tires loose to aid in the quick turns. The black one is set up with a 32mm pumper, uni, 17g sliders, and aftermarket header and Big Gun pipe. It does fairly well, but is fixing to get released back into the wild so I can focus on building my yellow one. One buggy has just hit the market that may quite well end my love affair with the Joyner and that is the BMS Sand Sniper 400. In short though the Joyner is a tough buggy to beat.