If you're not popping them like M&M's, they're quite useful. If you're on an SSRI or an NSRI, they're handy for the occasional breakthrough episode of anxiety. I've got Ativan, too, and although I don't take it very often, it's nice to have when I need it.
Yes, benzos are a bitch to come off, maybe on a par with DT's, but that's only if you're physically dependent. If you're only taking them now and then, and at prescribed dosages, you're not going to develop a physical dependency.