I’ve always been a huge fan of the SE handsets. I used them constantly while I was working with Sony, and not just because my team was writing some of their PC software suite. However the feature that always killed my use of the phone as my main unit was the 1000 contact limit in the address book. Either I had to sort out which contacts to sync or decide I wouldn’t keep any numbers on the phone at all. In the end having a complete database of contacts (which I can do with an iPhone, BBerry, etc) was more important than the design and usability of the rest of the phone.