I got my V4S 2 weeks ago. It is definately not a quad to ride on rough, rocky terrain. One thing I had a problem with was the nut on the upper swing arm. It fell off after a few hours of riding. That sucked because That killed my weekend. I couldn't find anywhere, where I was, That had a 14x1.5mm nut. My only suggestion is to make sure to loctite all the nuts and bolts. Other than that it is pretty quick. Does anyone know where to get wheel spacers?