The dimmer dims up and down if you stay on the button and turns on and off on shorter print. He remembers the last dimmer setting. I think that as far as functional.
After one day he was simply kapputt (lamp turns violently flashing and is no longer dimmed). Incorrect use can be ruled out: There was a 100W floor lamp connected in the foot enough space, Had Ment winding terminals is not critical, correct.
It is a recommendable product cost. Elsewhere, it is claimed, is identical with Elro InterTechno. This is certainly wrong. The codes are very different and more limited and at InterTechno I have not had such problems, also InterTechno on clearly reliable. Somewhere has to come from the other price.