Pros: Easy to install, cheap
Cons: Somewhat flimsy dimmer switch
I bought 2 because the switch on my old dimmer kept breaking off. It was easy to install. The dimmer bar hasn't broken off yet, but I guess 10 days isn't much of a stress test =).
If it breaks again I'll buy the more expensive touch sensitive dimmers. If you're cheap like me and careful when hitting the switch (unlike me), this is the switch for you.