Been enjoying mine since November. The bass is a little boomy at first and sibilant in some songs, but I found they settled down after a while. The sound remains bass heavy, but it doesnt intrude into the mids and highs. Overal sound quality (detail, resolution, depth and focus) and build is very good and meets my expectation at this price point.
All buttons work properly on my Galaxy S5 as well as Galaxy Note Tab. Telephony function is also excellent. I use them in some conference calls when in the office and the clarity is so good that I'm able to focus on the discussion rather than straining to hear what other people are saying. Outside, I'd say its average, only because the microphone tends to pickup a lot of ambient noise. I can only wish it came equipped with a noise cancelling microphone.. oh well, I guess you can't have them all.
For Comply fans like me, I also replaced the tips with Comply foam size 100. I prefer the TS-series, but the S and T-series should work fine also, just make sure the one you get size is 100. Be warned that the fit is a little tight and it may seem like its the wrong size. Expect to exert some effort to insert the foams.
Don't bother with size 200, they're simply too large. I'm a little disappointed with Comply in being slow in updating their website with the proper fitting guide for new IEMs.