For what it's worth, the N9 I purchased last October had very good exterior build quality (other than a dead pixel issue). I have tried buying a couple of N9s in the past month, and returned both since both suffered from the loose button issues and the use of ill-produced USB door parts. I have no idea if it is a decline in quality over time, a bad batch, or general randomness (you get what you get and you don't get upset).