I've primarily used Forsters...until I experimented with the Lee! Can't beat it for the price, accuracy, and utter simplicity. (Decided to try the Lee when I was shopping for a new cutter for my Forster.)
All you need is the basic cutter and lock stud ($5 at Midway): Add a case length guide and shellholder set ($4) for each cartridge you want to trim. And that's all you need for manual and power trimming! You can add a ball handle for the cutter for $5 if you want to stick with manual operation...but why, since the other has power capability?
Screw the case length guide into the cutter head, lock a de-capped case into the shell holder with the lock stud, insert the guide into the case and rotate the case with your fingers. When the cutter stops cutting, you are done! The end of the lock stud also fits into a power drill for power cutting...you can either hold the cutter or clamp it to the edge of a table.
Fringe benefit: considerable space saving over a mounted tool. I store mine in the smallest (snack) zip-lok plastic bags, identified by Majik Marker and the original cardboard ID.
Side comment on the Lee Zip Trim...an innovative idea, but the above system is cheaper.
