I went to Graciela in Los Cris. Was 190 euros for a 4 week course, 6 hours a week (think I am the friend that Jen mentioned, then again after last night TEA awards maybe not?)
Seriously it was brill, small classes (there was 4 in my group) taught in a proper classroom, we had great fun and learned so much. Graciela's husband Eduardo taught us and he doesn't speak much English so we picked the spanish up really quick.
It was quite intense but the idea is the more you put in the more you get out of it, really good fun and made some great friends.
You get a book, which you keep and you have homework each day. Also you get a certificate at the end of the course.
I hope to start the intermediate class soon and I will definately be going back to them, as can't rate them highly enough.
Am I allowed to put the website and phone number.....they advertise in the local paper? If not PM me and I will give you the details.
Good luck.