I have been using this microphone live for a couple of years, I would guess at around 70 gigs. It is not the best sounding microphone maybe, but the feedback rejection is really amazing in my experience. It takes some getting used to since you have to be really close to the microphone because of the pick up pattern, but that is why it rejects other sounds on stage. But be sure to practice this, since the pick up pattern is so tight it can actually reject the sound coming from your nose if you have the wrong angle, resulting in a stuffed nose sound.
I use a lot of effects on my vocals and that is why it is important for me to not have any other sounds leaking in to the mic, especially in smaller venues where the acoustic treatment might not be the best and a lot of the out sound gets to the stage as well.
And the build quality is really fantastic, it has been through a lot and the grill doesn't even have a dent.
Like the slim design and the black grill as well, plus it is easy to clean.