I stepped out on a limb and bought these mics, (knowing I could return them if I wasn't satisfied). I had one of my male singers sing into a track with
the XM2000S, then sing the song over again into another track with a
Shure SM58. Then I played back listening to both @ the same time, then turning one up & the other all the way down, then vice versa..... The sound is identical.
I then mixed down adjusting the faders in different parts of the song so that at times only the SM58 is being used, then other parts where only the XM2000S is being used, then parts where both are used. I can't even tell which mic is being used because the sound is exactly the same.
That's great news for me..... being on a budget. These XM2000S' are only about $29 each, and most of the internet sights, (American Musical, ZZounds) have a special where you get 3 for $59. Plus, they come in a hard plastic case with paded foam inside. The Shure comes in a non-paded disposable cardboard box.
I haven't tried these as instrument mics or on higher pitch female vocals yet but I can say on my bands male vocals, these pretty much produce a mirror image in sound to the SM 58's.
Overall.... Very Satisfied.....