As a pickp maker, I'm using these as the covers we include on our newer production Strat pickups. While they're better than others we've found, we do notice one issue.
The injection mold seems to be damaged in one of the "cavities" that the plastic material is injected into, and as a result, all the parts that come from that cavity have a deep "valley" in the top of the cover, sort of like if someone had run a hot sodlering iron over it. Identical in each cover with the issue, so it's a mold problem. It seems to affect about 1/3rd, sio I supect the mold has three cavities.
For the covers withut that issue, they're the best I've found so far.