When I first got into this I done alot of looking around and I found that mugen to be the better one for the fact that like somesaid earlier it is built like a tank and building it I felt confident that it was going to hold up to it rep for being a very strong kit Im new to this and in my oppinion if your going to do someting then do it right the first time Altough I would like to go with the x-ray as a next build. Back to the question at hand I have hit a fence post a 4x4 with my mugen a lil scratch nothing bent and I was well supprised my servo had striped its gear so I had no brake I was doing low speed but still the fact of putting it to a sudden stop and not breaking a piece that has to say something right there for the build and make of the buggy.