"The earth bar runs just close enough to short against an electrical screwdriver when you're testing using the screws. Yes, this happened to me - sparky drama. Sure, you're not supposed to work on a live fitting, but sometimes you need to.
All other switches I've used have a brass plate pressed flat against the cover, these have a raised bar for the earth which is simply terrible design. I can only imagine that it saved the manufacturer a fraction of a penny per unit in saved brass. This design flaw alone is why I have given the unit 1 star for features.
Other than that these are nice looking and give a satisfying clunk when operated.
Please ignore the reliability rating, only just fitted this one."