I wasted a lot of time for weeks while pumping and either having to stare off into space or watch a lame tv show.  This was definitely worth the money and is a must if you are going to be doing a lot of pumping.  You can still only move as far as your tubes on the pump will allow, but having your hands free means you can accomplish something while pumping - I eat my breakfast and lunch while pumping, catch up on e-mails and read.
This took me a few times to get used to, and with the avent pump I had to remove the petals (was leaking), but once I got into the groove of it, it was so necessary to save my sanity while pumping!  It also allowed me not to take as much time out of my work day since I could do it while eating during my breaks and while doing some computer work.