I just received my order, and I have to say, I am impressed. The fit is fantastic, easily better than any other IEM that I've owned. Sound-wise, I can't tell the difference between this and the NuForce HEM8, which is my current daily. I'll need burn-in time, which I will start tomorrow during my daily commute, but so far, this has been an excellent buy. I mainly listen to hard rock/metal, haven't heard any hissing, and the v2 are very beefy.