Value is there, but they won't take business away from the big names. If you are using a prosumer lever in ear system, these will easily upgrade what came with the set. I got more variance in tone from changing the foam fittings than in the barrels. YMMV, I am a larger fat-head kinda guy, maybe ordinary sized ears get the benefit.

I am very impressed with the MP80! I connected it to my fiio x7 mk2 and Pono player. I listened to a few dsd and flac files from Journey, Norah Jones, Celine Dion, Dire Strait, Boston amongst others. They all sounded incredible using the gray nozzles. I didn't try the silver or black nozzles but I don't think I'll be in a rush to do so. I even had to turn down the volume from what I normally have it at. The music came through loud and clear. The cord is really light so there's no weighted feeling when wearing these. Save your money from buying wired sub-$500 earbuds as I have. Buy these first, it'll "blow you away"! I bought these for my wife but she ain't having it now. I'm keeping it and buying her something else, lol!

Overall the sound quality is good. But obviously the freq response is not flat. The ear-bun fits well and mostly feels isolated from outside. The bass is boosted and strong enough, but a little muddy on range of 200-250Hz. High freq is crystal. So depending on what function you are using for, if in a live band you are playing and you want an "open" or "half-open", it's not the right one. If you are doing a post production mixing, it's not the right one either (not flat). If you are just enjoying a hi-fi sound source, it might be a good one.

I am no audiophile, but these have a really nice sound to them. I bought them for one of my sons and the other one tried it and now I am buying another.

The only negative is that the cable pulled out of the assembly (right below the MMCX connector. I would expect the connectors would disconnect before the cable is pulled out, I would like to just RMA the cable but I will need to RMA the whole thing.

I've had the MP80s for a while, but just have used them as is out of the box. I am a little disappointed with the mids and the lows, but I think I need to change out the ear pieces and tweek my frequencies a bit. I just haven't made time to do this yet. Good quality, packaging, and looks. I like the style of the wiring and the length is just right for me. I use them during treadmill and bike workouts and they are comfortable and stable. I'm confident that they'll sound better once I invest some time in setting them up properly.

Excellent so far. Only used them once so far but they seem very good.

These IEMs are very impressive, and not just when considering the price. The sound isolation is very good, cutting down the volume of a loud band while giving a much clearer representation of my keyboards and vocals.

The three different nozzles take some experimentation since there seems to be no intended nature of each one such as, more bass, more mid etc. I ended up liking the black in my left ear and the grey in my right. The silicone covers are very comfortable.

I found two things that are probably obvious and inherent in IEMs. The bass response is of course not as good as over the ear cans. However the mids and highs are excellent. On the positive side, the quality of the sound is so much better than any loudspeaker monitor, especially when they have to compete with guitars and drums.

These monitors have cut down on my volume and my guesswork in trying to hear my instrument in the mix.

All in all, a huge bargain for 80$.

Crystal clear sound. Big soundstage. Beautiful design. I can hear everything thing I m supposed to. These earphones should be in the 150 dollars range. They sound as good as a 200 dollar earphones. Buy them without any doubts and remember to find first which earbuds fit you right that is key to the sound profile, I'm using the double flange.

Great sound - wide soundstage & great clarity! Just can’t settle on which sound nozzles to use - both the grey & silver nozzles provide great sound depending on the music I listen to.

4 stars for sound quality. I'm a semi pro musician and have worn a lot of universal in-ears, and these sound as good as any even a couple hundred bucks more. The tuning nozzles are neat if not terribly useful. Pretty even overall, and as you would expect just a tad light on the low end, but not terribly harsh on the high end.

My suggestions for improvement would be to add memory wire to the over ear section of the cable. It has a permanent bend, however the cable is flimsy so it doesn't really stay in place. Also should have a right angle connector. I know a lot of people use these in their phones, but for "professional" usage, the straight in connector sticks up too high and is at risk for getting pushed over when you sit down with a beltpack on.
If you're in the market to upgrade from a single driver in-ear, these are a great deal especially if you catch them on sale.