While I was gigging in a band I built up my collection (which included ibe zoom multi for guitar) and I enjoyed messing with the order and settings and just generally stamping on them.
A year or so after the drummer left and i'd only been playing drums, but I bought a GT-6B because I thought it was a bargain. I'd heard a friend using one before and it was great. I played with it (having quite a bit of fun!) for around an hour but couldn't get any usable sounds out of it. I found the menus very frustrating. For example, I have no idea how to assign the EXP pedal to anything other than volume. I'm not think, and I did have the manual with me.
Anyway, an hour was enough, I loaned it indefinitely to our bass player.
Now i'm back on the bass in a band, I love my old pedal board, but part of me thinks I should really sit down and work out how to work the GT-6B 'cos it's a hell of a lot smaller and lighter and could leave me ££££s better off if I sold my single pedals.