I specifically put off the "upgrade" to the MPVI2 after hearing about more bad experiences than good with it. My MPVI finally died last week so I reached out to HP Tuners. I shared my reasoning for not upgrading when I emailed support because of all the stories. I was assured the device is perfectly stable now and no issues. So I went ahead and purchased the upgrade instead of going to EFI Live. I received my MPVI2 and got started catching up on work. It made it exactly a week and back to "Interface Not Found." I think we made it through 6 or 7 vehicles. It worked perfectly until it just quit. Same thing I had been hearing. Three different laptops, updated drivers, updated software, tried it all. No change. Support ticket sent, we'll see what we get this time other than more lost income.
This might be an annoyance for a hobbyist, but it's a big issue for someone doing it for a living. I should have switched.