Received mine, first impressions are disappointment in build quality. The eartips don't go in the earpieces easily and require a lot more effort than normally required, the earpiece grill ripped out when gently removing the eartip.
I should have known from reading the website's emphasis on talking about the bass, but as expected, these are definitely bass emphasized. The bass is not muddy at all but it doesn't have the tightness of my akgs. There is more bass than my ksc75s but not to the point where acoustic music sounds very bassy.
Mids sound fairly neutral from what I am hearing, but some male vocals sound compressed, which I can assume is coming from the Bluetooth compression.
Upper mids have an emphasis which sounds great for female vocals and electric guitar.
Treble is a little rolled off but these are not lacking in clarity though.
Soundstage is iem sized as expected, less than my ksc75s, but the instrument separation is fairly good so nothing sounds congested at all. So far, I'd rate them a step lower than my ksc75 but more enoyable in the treble region and upper mids.