I like them
Tried one, bought 6 at work. Everything sounds better. We took them to a blues jam, switched out the SM 58's(including 2 Beta's). The sound system owner liked enough he bought a set. He no longer uses the 58's for any vocals unless he runs out of the Senny's. In a perfomance setting they fit a wider variety of voices and you can get much more gain before feedback. I find they have more transparent sound than the SM58--although they might not be as hardy.