I've learned a few things about Polar FIS for the MQB.
1, The Folks at Kerma TDI are helpful. So are the folks at Polar, both interested in getting this working well.
2, They're still working out the details and bugs, and they have confidence.
3, Although finally available in my opinion it is not really ready, at least as of July 2018.
4, It takes over the "audio" screen in center of dash.
5, In some few vehicles it only works about half the time. Sometimes when starting the car instead of showing the usual display it shows "audio is currently not available". They're aware of this and working on it.
6, It may not be possible to update the software while installed in the vehicle. I tried without success. Yesterday I asked and was recommended to unplug it from vehicle entirely before updating, which is reasonably difficult to do because of the location. I'll try just disconnecting the car battery and see if it'll then update, crossing my fingers.
7, instructions, info, trouble shooting, how to update... all that info is lacking. Like I bought the black box and except phone calls to Kerma and messages with Polar I'm on my own to figure out what to do and how to use it.
8, It needs to be turned off before anything will work for diagnostics, like VCDS. This point is clearly stated in the short instructions.
8.5, Not explained. After disconnecting and reconnecting car battery Polar FIS, even if it was turned off, will wake up and be on. This caused some wasted time and frustration with me by the dealer's service dept when they couldn't update the car after doing the Phase 2 emissions... I had no idea that PolarFIS would turn back on after I purposefully turned it off before dropping the car off.
9, Currently many values have metric units only. I believe more english units will be available in a future update.
10, EGT, at least with version 1.9b5, isn't yet supported. This is the single reason I bought the product, but didn't know EGT wasn't yet a feature. They say this will also be working soon.
Overall I think Polar FIS for the MQB will be great, and I'm looking forward to using it. Glad the manufacturer and Kerma TDI are so helpful and attentive to the issues it still has. I'll be really glad when they get the bugs worked out.