I'm glad I did mine. I didn't need a PCM (2014 2500, 6.4L) so I got the I2 and I got a custom tune from Hemifever as well.
I had no set up issues with the I2. I first plugged it into my computer, checked for updates, unplugged it from the computer, plugged it back in and checked for updates again (knew that sometimes these things need two chances to update), then plugged it into the truck, selected my options and loaded the tune.
The canned tunes were OK but the custom tune really woke up the truck. I never dyno'd it before and after but the butt dyno sez I got a gazillion more units of Beast.
