The 320 is a GREAT airplane. It is, however, completely different from anything else. Learning the bus is very similar to learning a foreign language that has nothing in common with your own. You have to forget most of what you know about other aircraft systems and techniques and totally commit yourself to learning something new. Once you learn it though its an absolute pleasure to fly.
Good luck, and remember....
RETARD RETARD
(you'll get that if you do fly the bus)