My brother and I bought two of these Mics for our band.
We needed two microphones, that had an on/off switch and we wanted our Mics to be hard wearing. We thought that two Shure PGA58's are up to the Job. And we were right; the sound quality is very good, combined with sweet tones from my brother's acoustic Guitar.
It is, in my opinion, a perfect microphone: clean and defined.
Note: The SHURE PGA58 is a top microphone, and it's almost identical to the SM58 (but significantly cheaper!). A real alternative to the classic; it's really, really good!