At the right price, they're pretty good. More than $75? Not that great
First, the bad things: These earbuds were okay until I connect them to my Android phone, and while the connection process was amazing (like connecting AirPods to an iPhone), the sound quality was quite bad for these at $75. Static, distorted sound, and the inability of changing to AAC (or apt-X if it were possible) on Android because it kept reverting to SBC made it an awful sounding experience compared to what you could achieve on a PC. It may be just the phones I tried it on (Moto Z2 Force and Redmi Note 9S), but that was really bad. Also, keep in mind that the UV cleaning feature isn't available on these FN-4 earbuds (You need the FN-6 to have that included with your case).
However, if you got them under $50 (or even under $30 for some refurbished ones), they are pretty decent. They're the most comfortable pair of earbuds I've tried so far, the battery life is okay (around 5 hours, plus the advertised 12 with the case), and the app has an okay graphic EQ, which is far better than the likes from Sony and Sennheiser. The touch interface is very sensitive, but it can be disabled and customized to your liking. I don't like the Ambient mode that much, but it's available (it's just okay. Nothing insane, you can still hear people while blasting music, but what you hear the most it's your voice). The carrying case is good, tiny, with great magnets that keep the earbuds in place. You can see the battery life with a light the case has in the front (in the app, I think is shown by leaving the case open with the earbuds in). You can also tell the app to read other apps' notifications (and customize the speed and which ones you like to hear).
Overall, I like them because I found them in a good offer, but paying +$75 will be a bad experience when listening to music. These aren't for people that care about sound quality, even when having an EQ, on Android. I'm kinda disappointed it is this way because they're great when the price is right.
Verified purchase: Yes