I just got these and, I must say, I'm pretty impressed. I've had the Shure SE215, VSonic GR07 MKII (my favorite so far), V-Moda M80s, and some other earphones; these surpass all but the GR07, imo. The instrument separation is amazing, to say the least. I really like the powerful (yet not overpowering) bass and the detailed highs. I hear some sibilance when there's trumpets in a song but it's not that big of an issue. The soundstage is also quite likeable.
As far as the fit and comfort... I don't know why anyone would have issues with these. I put the small tri-flanges and they fit perfectly. Really comfortable, too.
Overall, I'd say I'm really, really pleased with the $50 I spent on them. I can't believe how much they cost, honestly. If I had tried these before buying my other earphones/headphones, I probably wouldn't have bought the others