one of my crazy projects involved drilling 3/4" holes in some 1/4" thick steel. i have a holesaw that i use, but the drill press i had didn't go quite slow enough, and even if it did, the belts would always slip if the holesaw even stalled for an instant. last fall i picked up the UP mill/drill for doing some work in the basement in the winter, as well as drilling larger holes in things that wouldn't fit on the lathe. well tonight i decided to finish drilling the holes for the project and put the handy-dandy huge ball bearing Jacobs chuck in the mill/drill and had at it. well when i was using the cheesy drill press it would take me literally 20 minutes to drill a hole because of the slipping belts. i am proud to say that tonight it took me all of 1 minute to drill the two remaining 3/4" holes.
in fact, it tool about ten times as long to get the mill/drill ready. even taking that ten minutes into account, i still saved 1/2 hour. now i am pissed at myself for not getting the mill/drill sooner because the previous six holes took me all afternoon one day.
it is nice to have the proper tools for the job.