Got my 20% done on Monday. . . looks awesome. Need to get some fresh pics this weekend.
Mine's Cool Vanilla. . . looks all the more like a chopped Bentley 'cause of the color. I love it.
In answer to your questions, I have about 1300 miles on her so far and so far so good. Ride is silent, power is great and VERY smooth. . . toys are amazing. Handling is floaty, but it performs really well: just scary coming into curves really fast because of the weight. The ESP is downright amazing (and quite frustrating when you WANT to get crazy). Every time I get in, I can't believe it's a domestic car: it's really that good.
Only a couple of minor complaints: there's a little vibration behind the gauge panel that developed at about 500 miles. Most people wouldn't notice, but drives me nuts. I'm going to dig in and fix it because I know if I warranty it they'll introduce 5 more trying to fix that one.

Also, the autostick is LAME with a capital LAME: it won't hold a gear worth a damn (still up and downshifts when it wants), and the tranny doesn't shift any harder when it's engaged. What else. . . mm. . . don't like the overzealous drive-by-wire system. . . it pulls throttle at the drop of a hat, which is a little frustrating. . . . want a really surreal experience? Just take your 300C (after 1K miles or so, just to be nice to it), put it in neutral at a stop, and jam the throttle to the floor. . . no rev limiter, it just backs off the throttle right at 3800rpm every time. . . .