I decided to go with MFW's recommended Intermediate Language Lessons this year (available free online), but we are not loving it. I used English for the Thoughtful Child last year, so I thought it would be an easy transition, but I really just don't like it! UGH!
I am using ILL, but through a lady that re-does it a bit. It isn't free, but it is cheap. The website for it is www.intermediatelanguagelessons.com. It may different enough to make a difference. We are enjoying it so far.