personally I love mine, it is very durable and I have not had any problems with it at all so far. It is pretty fast and on my small local track it can hang with the other mt's and truggies and I think with a larger engine and a better driver it could be doing very well. if you go to www.racernine.com you'll see pictures of his mammoth he won a few races in as well as other information on racing the mammoths.