I very much enjoy my 550 and used it for many years exclusively for pistol rounds. I have since moved to South Dakota and mostly shoot 223 at prairie dogs. I'm glad it handles that round. Swapping cartridges isn't as simple as I would prefer but it also isn't all that bad. I've had trouble with my priming operation and have changed to resizing and priming off of the Dillion. This all but eliminated my problems.
I've used mine for decades and will state Dillion's customer service is excellent.
