Increased my enjoyment in listening to high quality music, and that's just through the laptop headphone socket. Listening to 'LFO - LFO' for example, the first tune I play with a new set of speakers in a room, or to test headphones, the bass is a lot tighter than my previous set of ATH M50X and music sounds wider and more involving with a braod range of music that i've tested. Likewise, listening to poor quality recordings I can hear the impefections and lack of quality better, so perhaps not ideal for listening to low quality mp3s. I have a couple of Hi Resolution audio players and studio audio interfaces which i've yet to try with these, so hoping they can squeeze a little extra out of a track and that I can use them for creating music. It's good to be able to power a high quality set of headphones from a laptop headphone port though, so not wholley essential to use a DAC headphone amp, but that will probably be my next move for listening at leisure.
Cabling and connectors seem high quality too. My only slight disappointment really is that the Y-split in the cable to the earpieces is a little too close to my chin and sometimes I have to push a connector back into the earpiece when I start a listening session, perhaps after pulling the cables slightly with my chin when taking them off, so that might affect long term durabilty.