Doors take little effort to close and are pretty solid. Trunk needs to be firm but not overly. I think my F30 trunk takes a little more effort than my old E90's did, though. All in all, the car sounds solid when closing doors/trunk. Not like a tin can.
2013 F30 335i | Sportline | Imperial Blue Metallic | Black Dakota | 6-speed | HK | Cold | Premium | 19" Staggered Sports | M-Performance Exhaust
2009 E90 335i
2007 E90 328xi