OK, got 2 pairs (red and blue), posted over on Pulse when they first came that they sounded muddy out of the box, connected them to burn in unit for the past 4-5 d. I know many don't believe in burn in, suggest "brain burn in" is responsible, but I didn't listen to these over the time so I wouldn't just acclimate to their sound and get to like it. Going to burn them in more, but they definitely changed character. They have become much more open, detailed, still do have slightly recessed mids but the initial muddiness I didn't like seems to be gone (just a short listen, not my best gear, an iPod Mini into a Denon DA-10 that I'm also burning in), will connect it to my Pono later when I have some time (so far, Pono is the best player I've had in my possession, which includes i devices, Fiio X3, iBasso DX90, HTC One M8 phone, Samsung Ypp-whatever player).
Not a bad buy for the price at all IMO!