I have to confess I went to try Boblbees out once as I was paranoid about crashing my fixie (was riding brakeless at the time) while carrying a laptop.

The main problem with the Boblbee is that they really can't carry too much gear. They only expand a little so you can carry a laptop and your lunch, or a change of clothes but they don't have the carrying capacity that most of us need. The big ones always feel huge and the little ones feel stupid.

You also feel like a dork riding with them, you have to really really really need to like the design.

They look very flash and 'cutting edge' to folks, so its like riding with a giant 'please mug me as I have a very expensive bag with probably very expensive stuff in it'.

In other words, I don't think they're all that.