This microphone is one of the best things I've used money on. The sound quality is superb, with a lot of headroom and a very natural-sounding profile. I'm using it with my cello but I bought also an adapter clip to use it with a microphone stand so I can use it with any instrument.
It is very sensitive and the supercardioid polar pattern ignores a lot of outside noise, but some of it almost always leaks to the signal. You have to be careful not to use too much gain with it.
Some features I'm not so happy about. In the cord connector there's a clip (belt clip?) which I dont understand how to remove. I tried moving it and I accidentally broke the tip of the clip. In my opinion it's a bit useless. Also I'm a bit worried about the very thin cable, which is long and therefore subject for accidental damage.
It's a bit difficult to assemble to the cello strings, there's not a lot of room for fingers and you have to carefully plan in which order you connect everything. But after this, you can enjoy a very brilliant and textured sound. Sound quality is so good that I don't mind the other problems.