After living with this mic for a couple of years, have to say seems to be holding up very well, and have had no issues with it. Was surprised to see a loudspeaker manufacturer using this microphone (admittedly an array of 10 of them) over a more expensive b an k option during some beta test work, and have been using this in combination with Systune to tune, and monitor audio systems performance and sol during several tours. The mic is reliable and rugged, and hasn't measurably changed it response since purchase. Think, as well as reference work, a single or two would make fabulous flat frequency room mics as the omni pattern and the flat response might get a very interesting view of the room