To the untrained eye, it can be hard to know whether a mirror is good quality or not. In general, a good quality mirror will provide undistorted reflection and hold up well over time. Professionals may refer to a mirror’s flatness and thickness, but it can be hard to detect these features without an expert. So, rather than focusing on the mirror itself, the mirror’s frame may be a better indicator of quality. Solid timber may hold up better than MDF over time, but this isn’t always the case.