Has anyone here tried one of those and do you have any experience you can share? Unfortunately neither Fabspeed nor VRtune seem to be able to provide a before and after dyno chart.
Thank you

 

I am also looking into getting the fabspeed ecu tune for my 2012 3.6 v6. would be nice to hear any feedback on it..

 

I ended up getting the vrtune with the Mygenius. I like it a lot. Nothing dramatic but the car is more nervous and responsive. Worth it to me. I selected vrtune because they actually posted dyno charts for the V8 (which is the engine the V6 is based on). I also built my own air intake (according to the V8 dyno chart, look for it on this site) the air intake makes a big difference to get rid of a low rpm torque dip. There is simply very little info out there. So much more info on my Mercedes' Don't know why.

I never could find, nor get, a before and after dyno chanrt on the v6.

I also have Pedal X chip on it to tweak the accelerator pedal.