After dyno, and after 14 days of driving, if I don't like the result, I can always uninstall the software and go back to the factory setting, with all money refunded. So, I guess I can at least give that a try.
And yes, it's not like the old days, and if it was that easy, BMW or Dinan would have come out with their own long time ago.
I am only doing this since I had a great experience with my 2000 E39 540i. I ended up asking powerchip to tune it aggressively after the first installation, and they custom tuned the app just for me. I thought the result was good, but I have no dyno to back up my statement.
Hopefully after Monday, I will have some evidence to share with you all. I will be the first guinea pig so you can make judgment on what you see.
Wish me luck!
2008 328i coupe
Premium, Sport, Navigation, iPod/USB
Park Distance, Logic 7, CDV Mod
ZHP Shifter, Short Throw Shifter, M3 Sway bars