I've used this at a number of gigs now and it really works well. Duo, band and club gigs.
It's small and lightweight, one of the main factors I got this. Fits in a backpack and a perfect fit in one of those rolling carry-on cases.
I don't use the native app but there is a great third party app which is much better and easier to use.
The sound is great, preamps are very good, effects are decent.
However, I 100% recommend to get a dedicated router for it. The internal one just does not cut it. We did a gig in a small nightclub on the weekend with 200 people inside and we could not connect to the unit once everyone was in there ... It was lucky I had the foresight to NOT mute everything before everyone arrived, just in case this happened, otherwise we would not have been able to connect to unmute.
On the whole though, I highly recommend this bit of kit and I'm so happy with it.