I've had the MDR-Z1R and it didn't last. Horrible midrange bloat and lacking sub bass and detail. The MDR-Z1A I have now was an improvement in every area except ear pads and using ATH-MSR7 pads improved comfort, making the sound a bit more spacious and clear. The Meze 99 pads are on there now and they compete well with the highly modified Sony MDR-Z7 I formerly had. I sold them as the headband could never quite extend far enough to reach my ears, otherwise I'd have kept them for the sound, aside from that, they were comfortable in all other aspects. The full mids are there with the Meze 99 pads, with a bit more treble and much more low sub bass, even more than with stock pads. Still pretty clean in the mids, mid bass. There's a bit wider soundstage on the MDR-Z7 these can't match, but for a fraction of the price, better headband extension for my long head and portability they are close enough for me. They're not the most closed cans, but closed enough for anything but noisy environments. The MDR-Z7 was too, which I would call "very vented" with large bass ports, but not semi-open compared to semi-open cans like the Audioquest Nighthawk which in original wood versions is similar to a MDR-Z7 in sound, except for an odd high midrange dip (worse than the Z7 dip).