So the Isurus came in this morning. I've only had about 10 minutes with it with stock large tips. First (and I mean first) initial thoughts is that the sound is "quite nice" for a $20 IEM (what I paid for it). Of course, no burn-in yet, but I can hear its potential. The bass is plentiful; the mids are forward enough with nice vocals; and the treble doesn't bother me (some say it's shrill and too thin, but I don't hear the shrill sound or that its thin yet. I'm not huge on treble anyway, but would notice if it was too harsh).
What I'm getting at is that I can hear the potential in these earphones. Will it get up to GR07 quality? I highly doubt it. But I can see it competing with many of the $100 IEMs out here now. It's really a nice clear and detailed dynamic (not as clear as the GR07 or FXT90 ....yet). At $20 you can't beat it as a bang-for-the-buck in my limited time with it.
The mic - as expected - doesn't work with my cellphone, but the instructions clearly states that it would only with certain cellphones depending on the configuration. Not a big deal for me. I'm just mentioning this in case some of you think that is a defect in the phones, which is not. More thoughts later with burn-in, different tips and some quality time. Nice fine @ Dsnuts....