Quite an amazing bunch of replies. Some replies, I believe, may not be knowlege based, but a repeat of something heard, eh? I have two in cars here, both street cars, one raced maybe 30 passes, another with well over 300. Low 12 second cars, and we still like 'em. A friend we refered also has one, 13 second car. He likes his as well. One of mine is 15 years old. I haven't had trouble. Good luck in your choice.