I have a Hornady (hand crank) model. Yes, it takes a little time to trim a 100 or so cases, but I honestly don't need to do it that often, when I'm loading rounds in the midrange of recommended powder charge ranges recommended by the bullet/powder manufacturers.
I mounted the Hornady trimmer on a 3/4" piece of plywood that I can just clamp to my reloading bench, when I do the trimming. That way I have a stable platform making it easier.