Hi Eric!
I performed this exact swap. Bought this package from EdMartin Toyota. I installed it myself, not a biggie. After the install I got the "Headlight initialization required" message or something like this.
Since I dont have the GTS+, I went to a Toyota Dealership for this procedure (by the way, I live in Romania, not in the US). They did something... and when I got the car back I had no warning messages on dash.
I took the car and with the entire family went on holiday. On the road I noticed that, although the lights were working and no warning message, the auto-levelling function, the auto-high beam and strangely enough the headlights washers were not working anymore....
I was out of the country and found a big Toyota Dealership (Toyota Budapesta) and drove the car there.
They worked on the car for 7 hours, took it all apart and put it back (check the headlights install) and said they find nothing wrong. They assume is the fact that the headlights "are not European".
The bonus was, since then, I have all the time a warning message on the dash "headlights malfunction" (the lights are working but no "smart" functions.
When I got back home, I took the car to the first dealership (where they performed the initialization, I had no warning but also no smart functions) The say there is nothing they can do, they dont know whats wrong and that I should go back to the original rectangular headlights. They said, I have the error message on the dash because the rear axle height sensor receives no voltage. They assume it's because of the headlights ECU. All fuses and cables are in order (I never took the car offroad).
I took the car to the 3rd dealership. They said the same thing. That I should go back to the rectangular headlights.
I really dont want to do that (especially after spending close to 3000 usd...)
If you have any ideas .... please help
Thank you