The Lee stuff is spiffy and very, very inexpensive. There are 3 pieces:
There's a
lock stud that you can chuck into a drill. You can hold it by hand, too, but the drill is sure easy.
There's a cutter that takes a guide. I highly recommend getting the
trimmer with the ball handle. If you don't want the fancy cutter with the ball handle, just use the one that comes with the luck stud.
And then there's a guide and shell holder for each caliber (for example,
22-250) that you screw into the trimmer.
Chuck a shell, start the drill, push the trimmer & guide into the shell, and press until the guide bottoms out and the cutter stops shaving brass. Now, turning the drill slowly, deburr and chamfer. A quick press of 000 or 0000 steel wool on the case mouth with the drill turning makes for real smooth bullet seating. And if you need to mark your cases to make them easier to find, this is the perfect time to spin the drill and touch a sharpie to the case to mark it.
The only drawback is that you only get the case length that the guide is set for, usually something close to the recommended "trim to" length in the load manuals. So far it hasn't been a problem for me and my milsurp rifles.