Just finished install of the "000-051-419" part number Helix in my 2017 Golf TSi. Seems to be zero issues at all with the MIB2 system despite the missing "B" suffix.
Those plastic LATCH things on the back seat are a pain in the butt to remove.
One odd thing I noticed about my glovebox when doing the install... there was only one tiny rubber bumper thing that the door rests on when opened normally, even though there's a spot for one on both sides of the glovebox. It fell off when I dropped the glovebox all the way down. Guessing the other one just got missed during assembly or fell out during PDI.
I didn't need use a fish tape on the harness cable, I just reached up with my right arm as far as I could behind the glovebox and was able to grab the plastic connector that I fed through behind the head unit. If you have big arms though probably gonna need the tape.
I only listened to it for a few minutes in my garage, but even un-programmed it still seems like a great value for the $260 shipped I spent.