I replaced an existing exhaust fan piano switch with this timer. Installation was straightforward ie package had all the necessary wire join thimbles/screws etc. With several users complaining about the unit dying prematurely, I'm concerned and counting the months. Its only been 2/3 months yet. Timers in our other baths picked & installed by a pricey (but quality) electrician looks better finished and feels more solid (when I turn the knob) than this one. But this works OK. So far.
Learned 2 things that may help buyers:
1. Each manufacturer's "white" is a different shade/hue. So this 'white' timer is quite a contrast from my existing 'white' faceplate.
2. Worse yet, each manufacturer's design uses a slightly different rise from the sheet rock surface. My existing white faceplate is maybe 1/8 inch raised from the sheet rock while this timer installs flat against the sheet rock. Result, a timer that is not color co-ordinated nor surface mounted right. Looks like a patch job.
So, to do it right ALL switch/timer/faceplate etc. must be from same manufacturer and probably bought together. Rather pricey proposition (cf. to old style regular parts from home depot) if you ask me. Could run almost $100 for a gang of 1 switch, 1 dimmer and a timer & faceplate.