I've had my Dillon 550 for 12 years. If it got stolen, I'd buy another one just like it. If it wears or breaks, Dillon will fix it free. I've loaded with friends on all sorts of other presses and even though they worked well, they still didn't have the versatility of a 550.
Williamlayton, The Dillon 550 can be used like a single stage press. Or, you can run one round through at a time (4 pulls per round) or you can go full turret mode and produce a round with each pull. Each stage is accessible so if all you want to do is drop powder, then you place your case in stage 2. Same goes for sizing / depriming, bullet seating and crimping. Changing calibers is very quick, easy and everything stays in adjustment. The only adjustment I have to make when I change callibers is the powder drop. I can't imagine a more versatile set up.