Comfortable when you get them on. Only time will tell, but I don?t see these holding up to abuse and I wonder about long term use. Perfect replacement for the Audio Technica ATH M50X headphones. Theres not much to add to that really but hopefully somebody finds this helpful! These are dispoable tips by the way! I like this case quite a lot, and Im glad I bought it. 1A or unattended long duration of charge exceeding 30 mins. Puma needs to produce these en masse. I did like the detail in the music for specific instruments and vocals, and some of the bass notes were really clean and solid too, but listening to the same test tracks with my GR10s, the listening experience was just so much more enjoyable for the wired Grado IEMs that I couldnt justify the expense for something that I probably wont reach for if I have options in my nightstand. First couple times you put them on they feel a little tight but as the foam breaks in they are easier to slip on and loosen up a bit.