Originally Posted by BoilerUpXFire
7 cars with metallic tint (worked in a tint shop earlier in life) and never had a problem, nor any customers reporting problems with radar detector range or usefulness...
"SOME STICK-ON WINDOW TINT FILMS ARE "TERRIBLE" TOO. Some tint films also have metallized layers. We've tested samples from Wal-Mart (Axius brand) and AutoZone (Gila brand)."
We used only ultra preium films like madico, llmuar, solar guard, etc. and what is being discussed here is cheap walmart type film, a big difference IMO.
I drive my XF daily and the radar detector has saved me many times, and from considerable distances. I am ticket free in this car, daily driven - I think that speaks volumes.
And I plan to have my car for many, many years and do not want purple film in a decade...

being neither a "7-time end user" nor a former tint installer, I may be less qualified to offer conjecture or anecdotal evidence ... so I wont
I do feel qualified to say that I think your car looks awesome (really, very nice!).
I generally hesitate to speak in ABSOLUTES like ... never, always or ... WILL (as opposed to may). When I said, " ... will hamper the functionality ... " , I felt that to be true. However, after further reflection, it occurs to me that if the end user is unaware of a decrease in functionality - then is it truly hampered?
You seem like a good guy with lots of useful things to contribute, so I hesitate to split hairs here. If you have used radar detectors that rely on a rear-facing receiver (a Valentine One, for example) and have not witnessed any decrease in reporting accuracy, then that is very good news.
It was not my intention to dissuade anyone from tinting their windows. I thought the link (to Valentine's comments) had its place in this thread - so I added it (Given the steep angle of the rear glass, it occurred to me that this could be an issue).
It is my belief that a top quality radar detector and some other "speed monitoring counter-measures" are the least expensive pieces of speed equipment (in terms of cost to benefit ratio) that you can add to your car. I have gone to great lengths in my own vehicles to insure that my "counter-measure" equipment (be it passive or active) is used to its full capability - so I would probably not use any metallic tint .... but that is just me .
Like I said, your car looks really good and I am glad that you are not getting tickets
Chris