ive not had any problems. Get the more expensive ones. And stick them all on, dont just the recommended 3. Cos you have to cover the two empty holes aswell.
Its easy enough to drill them, just get keep drilling until your through the top of the rivet. then you can pop the rivet through the hole.
However i couldnt get the panel off from the other side, i just got renault to do it. They didnt charge.