I have no doubts they'll keep up with the other "name brand" R/C's. I just think it's silly for them to claim that their kits reach speeds that very, very few R/C's ever reach. And the ones that do are usually packing some serious stuff under the hood like 3-speed trannies and big block motors. I've thought about buying one of these bargain kits for quite some time now, but their bogus performance claims make me a little disgusted. These kits, with their low price, are (inadvertantly or otherwise) aimed at a young demographic. I honestly think that the high mph claims are drawing in unsuspecting kids/newbies. Someone that is new and naive to the hobby doesn't know any better, and they think their money is going into a 70mph kit. I just think it's wrong. But that's just me.