The ultralight Sennheiser PXC 250 mini-headphones are exceptionally comfortable, but their undersize soft-ring ear pads may require some fiddling to seal properly. Our test unit's noise cancellation capabilities were excellent. Sound quality was in a class with that of the Bose QuietComfort 2 (reviewed on the Gear page), but low-end response didn't match that of larger over-the-ear models. The PXC 250 is burdened by a cumbersome inline battery holder the size of a fat marker pen. Other than that, we consider it a fine product that easily justifies its price.