I'm also on the Sony MDR7506 plan. It feels about as good as a Bose QC in an office setting but is far less expensive. I had to give up on Bose QC after going t

I'm also on the Sony MDR7506 plan. It feels about as good as a Bose QC in an office setting but is far less expensive. I had to give up on Bose QC after going through two of them in about five years - the plastic started to flake off and they were falling apart. Active noise cancelation is good for aircraft, but they are tuned to NOT block out human voice, which the opposite of what is needed.