I could not agree more. I've had the 335i 4 door now for a year, and it's anything but the ultimate driving machine.
-Jerkiness when starting from a stopped position, or when geared down to corner
- Lunging forward when braking. Very strong, pronounced downshifting - even at slower speeds
-Harsh shifting between gears
-iDrive frequently shutting down for no reason.
-Low pro tires: side walls worn out after 15k miles (no refund offered)
I started a review page specifically for that: www.335ireviews.com