Pros: Natural sound, sound isolation, comfort, price
Cons: none that i can think of
This is my first IEM. I owned Grados and LOVED them, but i'm going to college and wouldn't be able to listen to my Grados in many places as they are open back cans. So started my search for an IEM that sounded like my Grados. I found the HF5's! These have a very natural sound just like the grados. Bass is present, not overwhelming, just right. Mids make listening to classical, jazz, and vocals a real treat. Highs are excellent as well and don't hurt my ears like make in ears. These are totally worth the $150 price tag. I much prefer them over the shure 215's or 315's.