Used unit at a gig live on 27th Dec, just used it for one 45 min set to try out and then went back to standard set up for rest of the night.
I had it plugged in directly to PA through stagebox & mixer and then sent via oputput to amp (prior to amp and cab modelling) to on stage amp for monitor, found I didn't really need that as was getting sufficient to monitor sound through foldbacks but it was of assistance. All in all was happy with sound and tone but still need some tweaking to get completely comfortable. BTW we play mainly Blues and Classic Rock.