I can't say enough nice things about these mics, they are perfect for vocals, acoustic guitar, drums, room mic, piano and i am sure many other things that i have not tried yet. The microphones are easy to use, but they need a good preamp, otherwise you won't be able to enjoy them fully. The only thing i don't like is that there is no -20db feature, either than that I dare say they are as good as the u87.