I'm looking into both of these systems because i've decided i want to tune my car on my own. I modify my setup frequently and dont like the idea of having to get reburns done. Have you guys had sucess with , or recommend either? I've heard from sereral people that TwEECer is great but is very hard for a 1st timer to setup/use. Right now Im leaning toward the PMS because it seems much more user friendly. It is however, a bit more exspensive. Any feed back would be much appreciated. THANKS