hey a couple of my friends where talking about the gtech and got me intrested in them i was thinking about picking one up but wanted to get some pros and cons about them like accuracy if its worth the money i have a 97 ls 4dr that i will be building up and i would like to see sum numbers with out having to go to dynos or track at least untill im almost done.let me know some of your experences with them or any other electronics