The end plates mount flush with the tail lights, so you don't have to worry about the spoiler sticking out. The spoiler is probably half the weight of the stock wing, it's very well crafted, and the mounting hardware secures the spoiler to the rear hatch solidly and it bolts right over the stock holes. I even went through a car wash once to see how strong it is & nothing happened. w00t!
The only thing I don't like about it is the small gap between the center piece & the end plates. The gap is not very big & the average person wouldn't see it, but since I assembled & installed it, I know where the gap is. Even with this minor imperfection I'm happy with the quality of the spoiler.