The size and sound of this amp stand out above, and beyond, anything else out there. While you are not going to use it for a 200 plus size venue, it works great for smaller and intimate sized venues. It is very simple to use, the learning curve is a straight line from purchase to sounding great. Honestly you have to be a novice with no experience at all not to get great sounds from this amp. I also use it for acoustic guitar, still sounds great. As a stand alone unit it's great. When I use it as a head for different cabs, or as the front end of a more complex set-up it fills the bill. As a pre-amp it couples great with larger class D amps. The DI box is fantastic. For the size, price, versatility, not to mention the sound. You can not get a better amp than this. I do not use the battery power option so I have no comment about that. I have been using my amp for almost five years, three days/Wk 2-3 Hrs at a time. Best invesment in equiptment I have ever made.