Pros: Isolation is really good, comfortable, sound is good in terms of bass and treble and detailed for its price.
Cons: Mids are somewhat robotic, really small soundstage.
Everybody knows Sennheiser. They are doing great job at delivering good sound for all prices. I am doing this review with price factor in thought.
First of all it is suprisingly detailed sounding headphone for me. I mean i am not audiophile or i didnt try much of audiophile gear but, they can race easily with px 100ii in terms of detail in my opinion.
It have a signature that bass is forward and treble is a little bit forward compared to mids, sounding bright.
Only thing i didnt like with sound is mids. They are some kind of robotic sounding and bad in terms of quality.
Lets talk about isolation, you can even use it on libraries. It is really well in terms of isolation. For the comfort, i can easily say i can wear it for hours without even noticing them.
As for desing, they are not fancy looking but they arent bad neither. I remember that i purchased them like 3 years ago and they still work well.
Final thoughts: Really good choice for who is looking for a in-ear with low budget. But with this value, you shouldnt look for a miracle to happen in terms of sound quality.