The design and build quality is great (the actual piece is different from the image shown, it's an updated version IBZ10BV2). EQ knobs feel very premium. It's compact and easy to carry around.Tone is decent at moderate volume, good for practice, but don't expect too much variation by adjusting the EQ. At full volume tone is simply not good.The headphone jack is an useful feature, you can plug in an AUX cable and record your playing.It's not that loud either, when jamming with loud guitars and drums you will get drowned out, which I guess is good if you are beginner and can't really play. Nobody will notice your shoddy bass playing in low quality camera-phone videos of your "band" and assume you are a decent bassist. But if you're actually any good and planning to jam regularly, definitely get at-least a slightly bigger amp.