I have this Kenneth Cole.
Usually carry it without the strap, but nice to have the option of clipping it on. Has lasted me a few years now of daily use, throwing in the car etc. and it still in decent shape. Very well built and I picked it up for a great price at their outlet store in Seattle.
It has a space that perfectly fits my macbook, ipad, documents, pens, business cards etc.
Calgary puck response to this thread has been predictable and funny. I can't imagine any of the backpackers wear suits to work? Sure hope not.
Interestingly enough, found that image on the askmen topic discussing the same:
http://ca.askmen.com/fashion/trends_...-dressing.html