Another vote for the Giraud.
Until it was available with quick-change heads, I wasn't sold. Now it's just a couple of minutes to change cutter heads and case holders.
I have found that I can get within a few thousandths by saving a trimmed case to use for setup. Then the witness marks on the machine are 0.009" for every 45°, so it's easy to dial in the desired trim length without messing up a bunch of brass.
With a thin leather glove, I can do 500 cases in a few minutes.
It isn't just a trimmer. As most know, it does inside/outside chamfering at the same time. Terrific little gadget and well worth the price.