Pros: easy to install, works well, plenty of features
Cons: slighlty menacing to configure
We bought this switch to throw on our outdoor lights in the middle of the night (to keep wandering adolescents away) and more importantly turn off in the early am to cut down on energy cost. It was fairly easy to install assuming you have experience installing gfci outlets, three way switches etc. If those things scare you, you might not want this unit. The unit works with a 3 way switch which was nice, since some other manufacturers only made timers for a single pole switch.
Once installed, the configuration was simple to follow, just a bit tedious . That said, I suppose you can only pack so much control into such a tiny switch.
All in all it works as described and have had no issues yet.