I previously owned these headphones and was always very impressed with the quality.
The sound quality was high definition and had lots of different options so there was always a level of volume that perfectly fit and worked best according to your surroundings. It can sometimes have a kind of snapping crackling effect and can become a bit offbalanced in terms of pitch sometimes but this isn't frequent.
The ear pads are comfortable and fit nicely round your ears, and do a great job at keeping them warm in winter also. They do a moderate job at blocking the outside noise out but this can be sacrificed sometimes if your surroundings are especially loud, especially on public transport which is a shame but is to be expected.
Calls can be taken wirelessly which is pretty cool and the sound quality is as good as a normal phone, even from the view point of someone on the receiving end of the line. It's quick, easy and effortless and takes less time than a normal phone would to receive phonecalls.
The normal controls are easily used and are located on the side. You can easily adjust the volume up and down and it's also possible to skip tracks this way which is something a normal music playing device and earphones wouldn't have which saves time, but mainly effort in the long run.
I enjoyed having these but didn't really have use for them due to their style not working well with my hair. I recommend them to anyone though, but they are slightly difficult to get at a good price nowadays.