just got this headphone that I will provide for mobile recording sessions. I made a quick comparison with my Beyer DT-770 Pro. First impression on the head : light and quite comfortable. Sounds not harsh, detailed, and quite natural. The very low frequencies are though missing (compared to the Beyer, which is not known for enhancing the bass...) but it won't be a problem for my use (recording, not mixing). The sound isolation is OK, quite similar to the DT-770. The manufacturing quality looks also OK, even though it's quite light and certainly fragile...