+ Ergonomic, you have 3 sizes of ear tips intra: to you to find one that suits you (personally, I aimed a little too big at first, which caused discomfort when I kept most of half hour) + Very few unpleasant noise in the ears when you accidentally touch the earphones or quibble with their son + Quality of noise reduction (especially effective with the sounds of 'working': by car, by plane, train, etc) + Rechargeable battery system + Ultra compact: handy travel by plane or (as opposed to external headphones)
- A bit small storage case maybe? I sometimes feel have to force to bring them in!
=> A little expensive at first, but excellent ... more in time! (I use them for several months, almost every day)
