This amplifier is definitely good for out-door events, busking or practice at home.
It is very compact and lightweight, could be easily put into a gigbag and taken around. With 6 AA fully charged AA batteries, it could last at least 2 hours playing with medium volume.
The sound is louder than I've expected, at least loud enough for playing in an open area with some friends playing guitars at the same time. With 2 channels, and knobs for gain, EQ and compressor, the tone from this amplifier can be quite versatile. However, it is still too quiet playing with a drum kit in a small room, and it lacks some low-end tone. But one cannot expect too much from an amplifier with only 3 watt power.