A 2 hour commute? Each way or total? Unless you are hard up for cash or this is the most amazing opportunity ever, this is a waste of your time. Find something closer.
As for the main question. If you plan to be programming or building systems, then 6-12 months on the help-desk will make you so much more aware of the sorts of things that are show stoppers for average users. In my experience technical staff with help-desk experience make better usability decisions.