The headphones are very comfortable. Build is quite nice for the price. Clarity and resolution are also very nice. Bass is quite present and resolved but does bleed into the mid-range. I have issues with the overall tuning of the headphone. The treble although present is too recessed giving a veiled or dark sound. I have tried different amps to see if they were under powered, even using the Fostex HP-A8C, there fails to be an improvement in the sound. If Fostex is to do another run of the T-XO I would listen to reviewers and adjust the tuning. I really like Fostex products in general, especially their headphone collaborations with Massdrop. Hope to see more Fostex in the future, in particular some of their headphone amps.