BIL owns a house on the cape and has an outdoor shower. We LOVE it when we go there and actually thought of installing one at our house (north of Boston). It just isn't the same though. I'm sure our neighbors would have thought we were crazy!! (besides the fact there isn't a door on the side of the house where we would want it!!)
I think it takes a little bit to get used to using one but that it's so cool once you get over the fear of someone seeing you through the wood! LOL