The clip part is awesome!  The issue seems to be in the outdoor adhesive strip.  I was hanging a lightweight string of patio lights, using clips as directed (every 2 feet) and in one day it was all shattered on the ground :(  I re-used the clips on an indoor project with a normal command strip and its perfect.  Issue seems to be the outdoor strip??
I could not return to the store as I used all the outdoor strips, but now my stash of regular command strips is depleted.  Totally bummed!