This is a lengthy review so I have put a TL;DR at the end. Also I put a lot of detailed comments so please read it all if you want to know everything.
I hope the ADV Sound people will read my entire review and make a version 2 of the model 3!!
the following review only refers to the wireless experience, although the wired experience pretty much the same (in terms of sound signature)
Sound: Sounds as great as everyone says, audiophile grade, crisp and clean. I did a bass boost using the native iOS equaliser to give it more bass when using the included silicone ear tips and it sounds great (like my qc 35s). Using the included foam tips gives it more bass and the equaliser isn't necessary. My only gripe is that I can hear a background hiss that kicks in whenever music is playing (the hiss is not noticeable with music playing). The hiss disappears instantaneously whenever music stops playing so I guess I can live with it. I haven't tried it but if you change the cables to analogue wired mode without the bluetooth necklace and plug it into your phone, you shouldn't get any hissing as the hissing comes from bluetooth interference. The hiss is comparable to the hiss from qc35s with the ANC turned on. There is feedback from the wires, but its not noticeable with music on. Latency is good (expected from aptX) and I could play CS GO comfortably.
Comfort: Fit is great and comfortable, stays in my ears even when jumping up and down, reminds me of the Shure SE215. (some feedback as I mentioned earlier if the wire is touched). It's a dissapointment to have no wax guards on any of the ear tips or on the IEM themselves, so wax could potentially get stuck deep into the nozzle. I just purchased some Shure foam tips for their SE series since they have waxguards which fit the Model 3s perfectly (comply is too overpriced). After using the shure foam tips, it sounds even better and isolated more than the included foam tips which were already great and plus they have wax guards! The isolation from the shure tips is comparable to my qc35's with max ANC.
Style: The necklace style is fine, but I have to wrap the grey cables around the black necklace cables once or twice to get the cables to stick close to my head. Otherwise I'll have wires dangling out of the necklace doing a giant loop 15 cm away from my head before going into my IEMs. If you don't twist the wires much the loops don't occur even without wrapping the earphone cables around the necklace cable. Minor/Major inconvenience depending on how many times you take it on or off. I can comfortably leave it sitting on my neck.
Connectivity: Connectivity is fine, no problems for day to day use (indoors and outdoors). Theres an occasional drop now and then but its expected with any bluetooth device (especially with the low latency aptx codec).
Battery life: 5 hours isn't much but I can't complain when I'm getting them at the sub 100 price point. I would pay double if I could get double the battery life, no background hiss, tips with wax guards, better necklace design and customisable voice prompts (see below) and maybe an app like what Jaybird has where you can tweak the sound profile.
Other comments: (less relevant but read if you want to know everything) Voice prompts are annoying since its a bit loud, I could do with less beeps and voices. Hence the customisable voice prompts. A short and simple beep like on the Bose QC35 is enough prompts for me. It turns off by itself if disconnected for 15 minutes which is nice, though it doesn't turn off if its still connected to my phone but no music is playing.
Something that no one else really says is that these earphones have a minimum volume level (in which no sound is played when it reaches this minimum volume). The quietest you can play this is just right for listening indoors although I would want to listen to it quieter given the choice. My new pair did have this problem, which I solved by decreasing the volume of my entire itunes library.
TL;DR, These earphones are 5/5 for the price and these are no doubt the best on the market in terms of the total package with sound, fit and comfort. I'd say its better than Jaybirds or any competitors currently out there and can come close to my qc35s in terms of listening enjoyment.