They are very good and love to help you if you have any problems. I bought one over a year ago and they have gladly updated my tunes as I added more mods. Their tunes are nice and aggressive, very streetable and even improve MPG (as long as you're not driving with the pedal buried in the floor). I definitely recommend them
98 GT conv. PI intake, MHS stage III ported PI heads/Stage 3R Bullet Cams,
JLT RAI, 90mm MAF, BBK 78mm TB,
LT headers, Mac o/r prochamber,
FRPP underdrive pullies, FRPP 4.10's,
SLP LM1, built 4R70W 4000 stall.