I don't carry anything above a mid-range designer bag to interviews, and try to keep even those to ones that are not overly identifiable. I'm always afraid to have a better bag than the woman who's interviewing me. This is because I once had an interviewer make a big deal about my bag, but it was not meant in a nice way. She said something like, "Oh, great bag. Seems really expensive..." It was kind of like she meant that I didn't need the job because I could afford a designer bag. Of course, I didn't get that job. Maybe because of the bag, maybe not, but since then, I go non-identifiable.