MXR Chorus is superb sounding but:
a) Isn't true bypass
Really? I'll take your word for it,
however on my pedalboard, I have the ability to bypass all the pedals (which are effectively in a loop) & I cannot tell the difference between bypassing them or having them looped in but switched off. I cannot hear one iota of difference or any extra noise.
Surely if you use decent cables, quality pedals & a quiet power supply then there's not much to gain from having true bypass?
b) Needs an 18v power supply
...which is supplied with the pedal. Also, several powersupplies (e.g. Dunlop DC Brick) include a few 18v outputs.
c) Is quite large
Yep, it does have a larger footprint than, say, a Boss. But it's not the biggest. Surely the size of the pedalboard is determined by the pedals on it, not the other way around? :)