I bought these for live recordings of drums, amplified guitars and audience responses. I tried them out as vocal microphones, too - just to compare with my regular SM58. I was pleased to discover the sound is not a million miles from the SM58 at 10 cm distance. These (like the SM58) have a boosted bass response when used at less than 5 cm and so perform as you would expect, though slightly less clear, close up.
For recording drums, the low end roll off works well in conjunction with even a cheap kick drum mic so I'm happy with the overall result. At <¤60, what's not to like?
Build quality seems very good with a rubber waist band on the mesh in case you drop it.