I had a great time at Ecoaldeia De Janas. It's a wonderful location in a small town, and despite it being a quiet and rural area, with so many volunteers there to talk to, I was never bored or wondering what to do.
While the hosts were very pleasant in my experience, I didn't have a lot of interaction with them. But for the welcoming spirit of some of the volunteers living there, and my interest in their work, I suspect I would have felt very alone. It helps to be outgoing, or to have a car that can take you around to some of the other towns, beaches, and sights in the area.