
I’d strongly recommend Marco if you’re in the area. I also interviewed a couple of great private tutors who will come to your house, but I decided I needed something to get me out of the apartment. I also considered enrolling in a group class, but I liked Marco’s approach more. If you’re looking for advice on what may be best for you, the BA Expats Forum is a great place to ask for recommendations for schools or tutors.
I also have a copy of Rosetta Stone, which is a great program. I started to use it before I moved, but did not keep up with it. I’m planning to go back to that as well to learn as much as I can as quickly as possible.
There are also a number of new Web 2.0 sites that promise to help you learn Spanish:
I didn’t use these too much, but they may be another good resource for you. I’ll let you know how my lessons progress.