My Q looked great with tinted tail lights. They didn't interfere with visibility enough to be a problem (you know me...I wouldn't have tolerated them if they got in the way of function). They were a thick film.
Aside from the lettering in the center section, if no one told you they weren't stock you'd probably never know.
First couple years I had the car I had no problems. Then one year I mysteriously failed safety for them...despite having passed the prior two years. Got a ticket for them that same year, too. Irritating, since I see black pickups driving around with nearly-opaque spray-tinted tail lights all the time.