It's a beautiful bag, I'd sleep on it a couple of days. Then, if you don't love it take it back. Chanel is too expensive not to be crazy about. Good luck. You'll make the right decision.
Honestly, it looks really big on you. A little overpowering for your frame. I have tried liking the jumbo but it looks dumb on me. I'm very petite so the medium classic is most flattering on me. I prefer the old chain as well. The new blingy chain just decreases its classic value IMO.