In order:
El Diablo - just a helper on a few jobs. No idea what was going on but performed fine. Tiny waste tank and black smoke.
White Magic Triton - Full time helper and not much of an idea of what was going on. Beast of a machine but had a lot of hours by the time I started and developed issues that weren't going to be solved by any garage mechanic.
570 SS - Lead tech. Brand new, one of the first off the line. Performance was fantastic but the mechanical issues were literally constant.
Legend SE - Owner Op. Bought brand new. Great little machine but heat and vac were not great.
Pro 1200 SE - Owner Op. Bought brand new. Performance was good but really it was a bit of a nightmare with constant little issues that couldn't be solved and burned through plugs and wires like a banshee.
Butler High Heat/High Vac - Owner Op. Bought brand new. I will never own anything else.