The CAL is very good for the price and is a warm and pleasant headphone with very nice comfort. Lacks some bass impact even though it has slight elevated bass and is not the most refined sounding. Compared to the COP it has no isolation to speak of so for portable use you have to take this into account. Compared to the similarly priced JVC FXD70 it has no chance to compete sound wise either. FXD70 possesses much better resolution, clarity, imaging, coherency, balance, slam and realness with better bass, mids and highs. Just on another level of fidelity and refinement without sound boring and analytical.