This is an interesting concept, but I wonder about a couple things. The frequency equalizer is a really nice feature for aging pilots. However, I wonder if they are making a mistake by not getting a TSO rating for this model. All of their other headsets are non-TSO, but their price points are clearly targeted at the private pilot who does not fly commercial. This set is now competing with the Bose A20, which is the preferred unit for commercial pilots who require a TSO’d headset. Also, I wonder what the life is for the CO detector and will it need recalibration or replacement periodically? My Zulu 3 set works well enough that I probably won’t be upgrading.