necchi - I agree with your comment about the Lee Case trimmer, being easy, and repeatable.
The only thing that I have a complaint about is that you have to purchase a different case length gauge/holder for every caliber that you reload. This is a great system, if you only reload one or two calibers, but paying $6 for every caliber you reload can get quite expensive, if you reload many different calibers. In my case it would be one for the each of the 12 rifle calibers I reload for. This is not counting the pistol calibers, which I usually don't bother with case trimming.