I looked for a long time for a good mini practice amp, and due to the size, my expectations were fairly low. However, I was quite disappointed in this amp's performance and I returned it after testing it with several guitars and finding similar results with all of them.
I mostly play clean, and part of the reason I was interested in this amp was that several reviews praised the clean sound. YouTube demos also showed off the nice cleans. I'm not sure how they achieved that; in my experience it was impossible to get a good clean sound out of it. First, you ALWAYS need some amount of gain on the amp, so it'll never be completely "clean". The user manual also states that the gain and volume knobs must both be turned up past zero to make any sound.
So ideally, to get a good clean sound, you'd have the gain low and the volume higher. Well, that results in a lot of static hiss. If you raise the gain and lower the volume, it starts to distort. It's just not possible to get a good clean sound out of it.
Even so, the distorted/overdriven sound was not great either. It sounded clipped and crushed (not in a good way).
On the plus side, the build quality is good and the amp is quite cute. But the sound just didn't do it for me.