I got this mic because I had researched Rascal Flatts to see what they use (C 520). I wanted a headset mic that fits securely, sounds great, and looks awesome.
Straight out of the box I noticed it was smaller than I had expected and it took a little playing with it to get it to fit right, but by about the third time of putting it on, it is incredibly secure and doesn't wiggle around or anything. The sound is great however I have had a little shielding problems with my in ear monitor cable but I'm getting that figured out.
I am looking to get another one pretty soon because I absolutely love this mic.