Mine just arrived. I have to say, straight out the box I'm not very impressed. I find it lacking in clarity, although the detail and Imaging are good. Bass is quite anemic albeit tighter compared to the k3 pro (probably due to the substitution of dynamic driver with a BA). The tuning is flatter, which is good. They're not sibilant. The fit is really good, theres no pointy edges, they're very comfortable.
Bear in mind these are just my FIRST IMPRESSIONS having spent only a few hours with them.
There is hiss (with X7 AM3), But only from the right earpiece (?), and it gets more pronounced when I plug in a better custom silver cable (8Core), its mild with the provided silver cable, but its there.
This is not a bad pair of IEM's, they're good, but they're in with tough competition at this price. The provided Eartips give a very wide range of choice (includes single/double flanged) The Bluetooth adapter is a nice addition to the accessories package (Although I don't see myself using it really, haven't tried it out yet), the carry pouch is convenient as well.