While the initial programming can be a bit tedious, there is no complaint with actual live use of A3. The modeling and compliment of effects is pretty incredible when you consider the modest price. I purchased this unit to use with a new band. It does everything I need. There are a few internet criticism that only two effects can us used with a model simultaneously. However, what folks fail to acknowledge is that several of the 40 effects pedal models are dual effects that combine either reverb, chorus, or delay in one patch. So, I found no since limitation. Since with the dual models I was able to arrange 4 effects with a model! Also, the mic input feature was designed to provide a second source for the guitars. But, those clever engineers allow you to choose where In the effects chain that mic is inserted. So, I just plugged an SM58 in and ordered my effects so the reverb and mod came last, and moved the mic just ahead of it. The result? Guitar and vocal effects in one small stomp box that runs on batteries. Genius. There are other little features that I look forward to trying too.
Love this thing. Really lets you dial in the sound you want. The anti-feedback function works great, the boost button is a nice addition. It just does a ton of stuff that you'd have to buy separate pedals to get to. The only gripe I have is that it can be a bit difficult to figure out how to use, but as long as you're willing to sit down with the manual and mess around with it for a bit, you can figure it out, and it goes you a ton of options. You can also only use 2 effects, plus a guitar model at any given time. Still, tons of great sounding effects and options. I chose this over the Fishman Aura, and I'm glad I did!