V1 has saved me MULTIPLE times
And it's the only one wth arrows which is very convenient and useful.
Wiring it was easy - fuse tap to cigarette lighter in glove box, run the wire up, plug in, and done.
Do not use power from +12V lines by the sunroof/interior lights at the top because many of them are BUS lines that will cause issues (unlike the E46 where this was the preferred place to tap).
THE TECH: Interested in seeing your mirror retrofit, I'm very keen on going that way as well. I will just have to buy another V1 for the other cars.