Bought this from OWC last year. After waiting weeks for it to arrive (due to overwhelming demand), it only took 10 minutes to install (which includes going outside to turn off the circuit off/on). I chose a highly-visible and -trafficked (sic) spot in our kitchen in order to get maximum use of it. It's just like any other wall outlet and the instructions are straight forward. Note: I'm experienced in replacing electrical outlets. If you aren't, or are intimidated, it's worth the $10-$15 for an electrician to do it for you (and eliminate any risk of electrical shock).
It's been working like a champ ever since, and better yet, the WAF was huge since it eliminated the use of several wall warts. Note: because it was designed to charge iPads (which take a fair amount of juice), all other devices charge much faster than if using their respective chargers.


