The Lee LM was my first progressive and what I still use today. I agree with the fiddly statement. You have to tweak things here or there. If I sit down to do 1000 9mms, i will probably dork up 5 to 10 primers because they will go in sideways and probably the same number of times, a primer won't get fed. I also have to re-seat probably 10 cartridges but that is because I am doing range ammo and sometimes the resizer doesn't like one so i don't get a full press. I just ordered an APP so i am going to do it in 2 steps from here on out. Deprime, prime, resize will happen on the APP and the the progressive will be used for everything else.
I don't have much 9mm issue with my Dillon 650, other than the norm of a higher percentage of case gage fails than I'd like.
It's be great to hear more on your APP experience though. Maybe in the APP thread? I'll look it up...
I picked up my APP for other purposes, but got away from all reloading for a few years, while component prices were high.
.