I have a Vendetta buggy and it is pretty good right out of the box. It's weaknesses are the stock front hub carriers and wheel hubs. The stock motor and esc are faster than a stock RC18 or mini-T. There is limited wheel and tire selection since it uses the same size wheel hex as a 1/10 scale touring car. You can fit Half 8 wheels to it with adapters. It also runs a full size stock steering servo, and you can also fit a mini servo if you choose. It's actually more of a 1/16th scale, as it is quite a bit larger than the RC18 and mini-T.
Mine is highy modded with all the CF options (mostly for bling), aluminum hubs, wheel hexes, and shocks. I'm running a Neu 6800Kv custom built motor with a Quark 33 amp Pro-car ESC.