[JFP in PA]

I have never been a fan of the iCarsoft units, the constantly over promise and under deliver on capabilities, which they continue to say will be available in a future update that never seems to materialize.

Obviously, the best would be a legitimate PIWIS system, which is lease only and opens at $20K for the first year. And don't even think about spending your $ on PIWIS clones, many of them are incomplete, cannot be updated, and some can actually damage the car's electronics. So, unless you are willing to spend mega $, I would go with the Durametric software. Not as capable as the PIWIS system, but much better than a lot of companies selling "made for Porsche" standalone units that are mostly global OBD II junk with a couple of Porsche specific capabilities thrown in for a higher price than a global OBD II unit.