I've got a set of PK-5A and they are rather good (though I would've preferred they were mains powered rather than using an external PSU). Once you learn the channel/patch/octave dance they are quite straightforward to use.
I've got a 12-Step which I need to get to grips with; it's more of a program it via a laptop approach.
I've got an RB 5-string I'm putting together from parts.
Corvette body, Fortress neck, bridge, machines are on it.
I need a pair of J- style pickups to finish it and I'll do the passive harness.