Recieved my Onyx Neo a few days ago, good design, very comfortable, surprisingly good sound, but absolutly stupid SW! Works normaly only with PC or phone, with other devices (some players or TV's) which not have headset (calling) profile switches off after 4 minutes! Sadly, because I bought them mainly for my Shanling M0
I don't know if this is normal, but when I connect one earpiece to BT 4.x source, then this side discharges faster and will turn off after 3 hours due to low battery. However, the other side still has 60%, so if I reconnect them after aprox 2-2,5 hours (at 40%) to the other earpiece they will play together for more than 4.5 hours, which is incredible at such a size and moreover, charging in case is really very fast. Stock eartips are useless, but with many other standard tips (smaller than I normally use) they go deeper and hold better and more secure in my ears. Fortunately, there is enough space in the charging case and can be loaded without problem. Onyx Neo is no longer blinking while listening and will not bother you in the dark. Sensor sensitivity and response are too bad, but over time one gets used to it. I definitely do not miss the mechanical buttons and even if the control scheme is not ideal for me, it's better than it was on Spunky Beat.
I was a little skeptical about the sound from 6 mm DD, but it is quite well balanced. Although a bit simplified and without extra detail, but listening with non stock eartips is nice and nowhere does not matter much. Yes, sub bass is missing completely, bass don't go too deep, but they has good speed, they are well textured and controlled, their amount is close to ideal for me. Mids are a bit recessed, the details are rather average, but the vocals sound pretty good. Considering what this TWS are for, I don't see a big problem there. I would commend Tronsmart for the high frequencies, the resolution is not as good as from the BA, but it sounds natural, without metalic aftertaste. Overall, the sound really went well, it is not perfect, but considering the price I have nothing to reproach. It reminds me the Sony MH755 without sub bass and foam filters inside, maybe Onyx Neo are little bit brighter than someone likes, but it suits me so much. They might have been ideal for traveling if they weren't that stupid shutdown problem when connected to some DAP's.