While I was reading the instructions for how to mount the little steel tabs on the rails I was wondering why they were so...careful...explicit about placement/alignment...but when I put it all together and snapped the fender on I understood. (not that I did it wrong...so how would I really know)...but when you do it the way they said to do it...it sticks as well as if it were glued on. It super firm, no rattle at all...and it's nice to be able to just pop/pry it off if you need/want to. The quality actually feels a little better than stock...the finish is better, the plastic feels slightly less brittle. It is 100% the thing to buy...I only wish I'd been bolder and hadn't just gone for the black. Yellow...I should have gone for the yellow.