Headset compatibility, isn't just with the aircraft but with the other headset too. I bought a Sennheiser headset for this reason, and find that others using the Bose headset with add on mic, gives me no side-tone when they transmit. Therefore I only hear ATC reply after the call.
This is why many airlines are restrictive on different headset mixes. Just sad that Sennheiser have dropped out of the game.