I've used the CA for about 2500 hours on C-172, PA-28, PA-44, DA-42, E-145, and now E-175. The ONLY complaint I have is that on the 145, it picks up a lot of wind noise and depending on the air-frame, has some NAV/COMM2 bleed-over when the mic is on. I've flown with people who have the TSO CA on the 145 and the bleed-over is really bad with that version. The non-TSO, not so much. Ironic much?
I love this headset. It's cool on hot days and I can wear whatever sunglasses I want.
I also have the Telex 850 and it not only hurt my ears on long flights, but the altitude alerter is so loud that it's painful. I can keep the volumes down very low with the CA. Good for my hearing.