Had them installed 2X. First were broken so reordered etc. Second set went on fine at the dealer but come off way too easily. Anyone else having similar problems?

 

I installed mine and it was a bit challenging. They were not exactly the right shape and took some encouragement to go on. The biggest issue were the clips, especially the one closest to the car. It is easiest to install them with the mirror removed (snaps off easily) and I had to use a small screwdriver to ensure that all of the cliips were secure. Once I did this the caps were secure.