I got mine yesterday so far so good with a few gripes, not a fan of the cable at all, dont like the shiny finish, and on the one side where the wire is to bend over your ear looked like it was going to bust out of the cable within the first 10 min of use.
Some IEM's i can use medium silicon tips but large seems to be the way to go with these for me, I tried the Comply tips that came with them and it just made the music sound muffled, but ill have to play around with them cause when i took them out it looked like part of the foam was blocking the tip a little bit like it wasn't going back to its original shape.
Like some others have said the vocals do seem a little recessed, but im coming off of the harsh S4i, other than that they sound very clear and sound great with my E6 (i don't EQ my music i just like to hear it as is, since i listen to a lot of different types of music from classic rock all the way up to electronic). My GF wanted to try them and she never wears headphones or IEM's typically just blasts her music in the car. She played "You make me feel" by Cobra Starship (320kbps) and a couple seconds in she goes WHOA i never heard that slight little eco in the lyrics in the background (and if she wasn't about to go to bed i probably wasn't going to get them back).
Overall I think i just need to keep listening to them and just get use to the sound, they are def going to still be my go to IEM. Maybe a little ways down the road ill try Monster Gel tips and look at new cables.