This is the only multi fx I haven't junked in a petulant frenzy after about a month. Ignore the presets, most manufacturers seem to over do these.
I was put off by the early Zoom stuff, which I found noisy and too complicated, but thinking of it as a row of 3 stomp boxes at a time makes more sense to me. I like to wind the controls about until they sound good, rather than worrying if 68% rate sounds better than 70% on a digital readout when tinkering with, say, a flanger or chorus. So it really suits my simple outlook. Also easy to adjust on the fly.
I have it in line for most gigs, and it doesn't sound as if its eating my tone at all. I initially used it on a true bypass loop, as a 'get out of trouble' button, but found I didn't really need it once I felt confident with the B3.
The looper is fun to play with, but I mainly use it for octavers, filter effects and some of the amp models; mainly SVT and B15 but the others sounds pretty good too IMHO. I also have a cheeky bank of reverse and filtered delays for a bit of the old Psychedelia Smith.
Solid build, no issues so far. Worth a punt, if you don't like it you'll be able to move it along on here at not too much of a loss.