they are if you do them right. the rex i have now is my first and ive had it ABOUT A WEEK. but me and my girl have been fucking around with hers for a little over 1.5 years and its fun. but finding certain parts is a bitch...Yea I hear you on that. Thats what im goin for, but im not worred,i got A full time job and get paid every week. but ya Im lookin for one now. I think im set on one. they seem like real fun cars to build up.