I have 3 Lee 1000's (4 if you count the one I picked up for parts)
1 in .223
1 in 9mm
1 in .45
One in 38/357 & one in 40/10mm one day I am sure.....
I used to have a Dillion SDB but I went the other way and sold it, I was taking it apart just as often as the Lee and buying the parts for a cailber conversion was about $400, where as a new Lee is about $250 to your door.
The .45 Lee works every time with out a hitch, I usually get about 1500 rounds through it before I need to take it apart and clean & lube it. I usually average about 320 rnds per hour with my Lee 45.
The 9mm Lee works 'most' of the time, I generally have to take it apart every 300 rnds or so to clean and lube it (I don't know why) and it always seems to be out of time, I usually keep a phillips head screw driver at hand when using my 9mm Lee. I figgure its the whole tapered case theing takes more pressure and therefore more abuse on the rotating & moving parts of the press. I usually average about 250 rnds per hour with my Lee 9mm.
The .223 Press was a real mind bender till I got a system figgured out. I eventually just removed the re-sizing die from the press and re-size, deprime, trim & re-prime all the old fasioned way (single stage) but I still use the Lee to fill the cases with powder and to seat the bullets.
I usually stand when I am loading with my Lee's so I alwyas check for powder, I do seem to miss the odd primer, the trick is to use a powder that does not trickle out of the flash hole, so you don't have a mess to clean up.
I know a couple of guys that seem to have a squib every 150 rnds or so out of their Lee 1000's I my self have not had 1....... ever (about 7500 rnds on all 3 ). (knock on wood) I did have a bad primer once, but I don't consider that a sqib, more like a dud.
Some times when I am feeling brave I go out to the garage and prime those loaded cases (the ones off my Lee with no primer), I don the welding gloves, saftey glasses and a face shield & my ear plugs. I then take the hand primer & one primer than pick up the case........
I've done this about 130ish times now and still no bang in my hand....... come to think on it..... most of those were 9mm cases too.
My $.02, YMMV
Cheers!