I certainly don't regret buying mine. After a month of ownership, this is what I feel is better than my 350:
Quite a bit quicker, especially the pick up at higher speeds.
The steering is among the best for feedback of anything I've owned including a Lotus.
Much less intervention from the TCS and consequently you can boot it out of bends harder.
Sounds incredible over 4000 rpm and that's not taking into account the switchable exhaust mine has fitted.
Build quality, obviously.
Better on fuel by about 2mpg on average.
The only advice I would give is don't buy one with 19's unless its got PASM fitted otherwise it will knock your fillings out. Mine has and its fine. The one I test drove didn't and it was way too harsh.