Sound wise these headphones are really good, the detail in these headphones is is excellent and the low-frequency response is ruler flat. Unfortunately there seems to be a wide dip centred around 2kHz and a massive peak centred somewhere around 10kHz. However, this is pretty common in "Audiophile Headphones". The headphones take EQ really well and pair excellently with sonarworks.
My Issue is mostly with the mechanical design. The plastic mounts are fastened to the headband with two 2mm self tapping screws into an injection moulded plastic. This joint is very poor and the screws will readily strip out of the plastic.
My pair broke on the week that I got them. The right yoke assembly came off completely when putting the headphones on. Drop's support wasn't much help, accusing me of using excessive force even though I babied them as I was already aware of the build quality issues. So overall my experience with these headphones was pretty terrible.