I've been using these for just over a week now in various scenarios and they haven't disappointed.
Comfort They come with 5 different earbuds so you can get the best fit for you. One of which is a sport design where like a 'hook' shapes to the ear and stops it from falling out if running. These have replaced my over ear headphones I was using in the gym as they are much more comfortable and sweat doesn't build up as much but the fact they are sweat and splash proof is a great feature!
Sound Quality Really impressed with the sound quality. Good bass but not too much that it overpowers the mids and highs. It's premium and you can really tell the difference vs cheaper options.
Noise cancelling they have 4 levels of noise cancelling, level 1 you can still hear some of your surroundings which is good if you are out running or cycling to hear traffic for example. Level 4 is max which has been great when I'm on the train or just want some peace and quiet at home. You can set this manually or there is a 'smart' automatic option which will adjust to your movement and surroundings.
Battery Life It seems true to the up to 8 hours quoted but this will vary dependant on use of the noise cancelling and volume preference.
So all in all these are a great all rounder from going to they gym, commuting or just when you want to chill and listen to music. Im very happy with them and they are just what I was looking for.