I'm a current student at the CIA. I'll be leaving for my extern in about 5 weeks. I have learned a lot, but I know I still have so much to learn.
The actual kitchen production classes are fun, but you have to remember that the enviroment isn't realistic. You aren't going to have 4-5 people on your station doing 40 covers.
Take in as much knowledge as you possibly can. There are so many great opportunities here. A few months ago I worked at a benefit in NYC and I was around some of the most sucessful Chefs in the country.
If you have any questions feel free to PM me or shoot me an email at firstname.lastname@example.org