I busk all the time in Chattanooga, Tn. This little amp is absolutely perfect for this. It is a lot louder than what you might think from it's size....more than enough for busking. It even sounds great with backing tracks through the Aux In. The bass and drums come through nice and clear with no distortion, even at full volume. At full blast, you can easily be heard over 300 feet away.
At around 10 lbs, and a little bigger than a lunchbox, you couldn't ask for anything more portable. It's amazing where all that great sound comes from. You get around 8 hours playing time with a full charge of rechargeable AA Batteries. I bought a portable power source that runs it for around 50 hours before recharging.
The sound, especially with an acoustic guitar, and vocals through any decent mic, I can only describe as pristine, studio-quality. But it also handles aggressive electric guitar riffs smartly. I run a TC Helicon VoiceLive GTX processor through my AC-33, and it doesn't break a sweat, even with a Stratocaster on full burn. Sweet, or nasty, the AC-33 handles whatever you put into it. I even play coffeehouse gigs with it (50+ seating), and never have any complaints about not enough volume. In fact, most of the places I play appreciate the volume level...not too loud, but just right.
Other great features are the built-in looper, anti-feedback, and beautiful Chorus and Reverb. The only negatives I can think of is that Roland failed to make it Bluetooth compatible, and they do not make a case for it that I am aware of. Lastly, it would've been nice to have a stand mounting bracket on it, although they can be easily added. I put one on mine, to mount on a Proline Speaker Stand.
Runs for around 8 hours on batteries
No bluetooth (are you listening, Roland???)
No case made specifically for it.
No mounting bracket for a speaker stand.
It's hard to see where you could go wrong buying one of these. It's worth every penny, and then some. Mine has paid for itself many times over.