Is 30w amplifier good?

Excuse me, could you please elaborate on your question regarding the quality of a 30W amplifier? Are you referring to its power output, its suitability for a specific application, or its overall performance in terms of sound clarity and fidelity? Additionally, are you considering a specific brand or model, as the quality can vary greatly depending on the manufacturer? Without further context, it's difficult to give a definitive answer as to whether a 30W amplifier is "good" or not.