I have one fitted to my car. Took about 2 hours to fit we didn't have a template so just did it free hand.
Looks pretty good to me I wasn't willing to spend big bucks so $120 was just right for me.
The most annoying thing about them though is you need to relocate the indicator down lower as it gets covered up by these particular models. Other than that I can't see anything wrong with them.
It's only been on for about 3 months and I haven't noticed anything happening to the plastic of it just yet.