Here's my review of the the Noble Falcon: The build quality is decent, on-par with the Nuarl NT-01AX. In fact, the case is clearly made from a very similar design and material as the Nuarl case, so I would be surprised if they didn't use the same OEM (heck, even the lights on the earpieces themselves are the same amber color as the Nuarl when charging). However, the nice thing is the Noble's case actually has magnets to hold the IEMs in place and seems better thought-out in terms of basic ergonomics.The case itself is probably the tiniest I've seen from a TW IEM. As for the earpieces themselves, they are small housings with really long nozzles for a deep insertion. They don't seem to passively isolate as well as you'd think considering how deep these go into your ears, but the actual housing is quite small so maybe that's why. As soon as music turns on I can't hear myself typing on my mechanical keyboard, however, which shows the benefit of the deep insertion being so close to your eardrums. Comfort-wise I'm finding them mostly good. Within the first 30 minutes my left ear developed a slight ache in my ear canal similar to what you'd get with custom IEMs, but I repositioned them once and 90 min later they're still fine. They seal really well, however, and it hasn't been a struggle to find the right position, which was a constant pain on the Nuarl and Sony XM3. Btw, the earpiece LEDs are pretty cool but having them flash periodically even when music is playing is a questionable design decision that reminiscent of ugly bluetooth headsets of old. I definitely won't be able to wear these while falling asleep at night without the flashing annoying my wife. There is a barely perceptible level of hiss present as we've seen happen with all the Qualcomm-based units so far, but it's probably the quietest noise floor I've heard from a TW IEM so far. In terms of sound, these are a mixed bag, unfortunately, and it is solely dependent on what type of music you listen to: The Falcon have a mostly neutral sound signature from the bass through the mids with a midbass hump to add some warmth and rhythm. They remind me of the Mavin Air-X quite a bit in that regard. Those parts of the frequency response are clear and smooth with bass evenly transitioning into the mids. While the bass isn't as well-defined as the L2P and is much less in quantity, it sounds pretty good with decent definition and thump. The mids have a really pleasing tonality that emphasizes clarity, which was similarly the hallmark of the Noble K10U I briefly owned several years ago. Tonally these areas of the frequency response are slightly on the lean side, but have proper weight, and I prefer slightly lean to overly thick any day. If you listen to music without a lot of energy in the upper registers such as classical, jazz and acoustic singer-songwriter genres, you'll be satisfied with how close the Falcon gets you to the performance. When you keep going up the frequency range is where things start to go off the rails. There's some sibilance, shoutiness and hash in the upper mids and treble, and while it's somewhat track-dependent it's pervasive enough that I've started thinking of the Falcon as a bright-sounding IEM. Listening to some of my favorite metal bands (Baroness, Deafheaven) can turn into an exercise in wincing with the cymbals and hi-hats often (but not always) coming across as bright and splashy to a fault. I really wouldn't recommend these for anyone that doesn't have very specific listening tastes that tend towards reserved and demure as opposed to face-meltingly heavy metal. I don't have this problem with the Mavin Air-X or Soundcore Liberty 2 Pro, both of which do a good job conveying treble definition and extension without ever seeming bright. Incidentally, the volume also ramped up to 100% on me randomly in the middle of a song. Hopefully that's a one-off glitch... The basic problem that I keep coming back to is the Noble is mostly good if you like a more neutral sound signature, but it doesn't do anything that isn't matched or exceeded by the Mavin Air-X which is a similar signature but with much better execution. The Noble seems to layer and image a bit better than the Mavin and has a noticeably nicer build quality, but outside of that I'd reach for the Air-X every single time I wanted to bliss out and enjoy some music. On top of that, the Soundcore Liberty 2 Pro exists. While it's a very different sound signature (bass for dayzzzz), the ownership experience, comfortable fit (for me, at least), build quality and general sound quality is superior to the Noble. IF they can fix the hissing in the Soundcore I think it's probably the best all-around TW IEM on the market for a more consumer-focused sound. TL;DR: The Noble Falcon is a decent first effort, but has a sound signature that can be bright, and doesn't really do anything better than other options on the market right now. EDIT: I just went back and found a review I wrote a few years ago of the Empire Ears Zeus-R where I compared it to the Noble K10U. Here's what I said about the Noble K10U: "While it was a fantastic IEM in clarity, smoothness and especially soundstage, it really fell short when it came to treble. To my ears the K10UA was fatiguing after short periods of time, and I found myself wincing on recordings mastered to be a bit "hot." The K10UA really seemed to accentuate the rougher qualities of those tracks to the point of discomfort, and treble definition suffered as cymbals were particularly splashy and grating." Sounds familiar..