Everything has been said ...
I have not tested the USB connection.
when compared with other multi effects, features are excellent for the price, quality and size.

UTILIZATION

Easy to use, I had a 505 before (his grandmother) and the configurations are similar.
Only regret on the old version, I could spend the A1 to A4 without hearing his patches A2 and A3, here I am obliged to give several times the same sound in different patches to avoid hearing a distortion or flanger before reaching the delay.
damage.
the buttons are a bit screwed up too badly, you must have a large foot to simultaneously press two buttons and a rather small foot to press the right button otherwise it may affect the expression pedal ...

SOUND QUALITY

The effects are good overall and there are very strange and fun to use. I play with a 5-string bass tune in LA (a tone lower as Korn) and passes very serious.
by fiddling quiet, we can find the sound that we should (must of course also have the amp that suits us and bass)

OVERALL OPINION

I have been using for months and it works very well.
the price / quality ratio is very good and I will redeem the same again!