Pros: Fine bass, clear mids, cheap.
Cons: Feels cheap, doesn't beat 100$ headphones.
These ear-buds were just lying around my sisters house, no idea whose these are but they are kinda pretty good. They are quite sensitive 108dB/1 mW, and I don't have to turn the volume more than 20% in windows volume to get enough pressure for all needs.
Sound quality in short: They are not comparable at all with the standard apple ear-buds in terms of sound quality. That much better they are.
Build quality: I can't hear much microphonics with the cable. The headphones feel and look cheap. They are not comfortable, at least for me in the long run. 1 hours is pretty much max I can wear them, and I have to take them off.
Bass: The bass is quite strong for an ear-bud, but not overpowered. It rolls of quickly at 60hz, but still manages to bring enough rumble for even most electronic music. Definitely not for bassheads, those people who look for integrated ear massage.
Mids: The mids sound somewhat colored (they sound slightly plasticky), but they are very dynamic and resolving which was huge surprise. I wonder if the plasticness could be modified away with some cup damping?
Highs: Don't have any cans to compare to, but they are not overly bright, nor dark. Sounds quite flat and extended to me. Not sibilant.
Instrument separation/soundstage: They have quite good soundstage, and instrument separation is good. Not challenging 200$ IEM's here, but they can give quite a challenge to some 100$ IEM's for sure in this department.
These cannot satisfy the needs for an audiophile or basshead, but for average listener these provide a very good sound quality especially for the price.