This is a review for Rose Gardner rather than for French I, because the content of French I probably requires no explanation.
If you're interested in learning French at Columbia, I can't recommend Rose more highly. She was very good-humoured, very supportive of everyone in the class, extremely kind, and created a wonderful class atmosphere. Going to class every morning at 8:50 actually ended up being kind of a pleasure.
I had a great time in the class, and learned a lot of French. If you're going to take the class with anyone, take it with her.