Just got these yesterday and they are exactly what I was looking for. Sound is better than expected and battery life seems to be longer than 4 hours before I have to attach the battery clip. It also charges really fast compared to things like my phone or bluetooth speaker. You can also charge that clip separate from the headphones and keep the headphones going endlessly without ever having to take them off and plug them in.
On foobar I adjust 2.5khz down about 1/4 below neutral to reduce sibilance in vocals, also 3.5 a little down. These aren't perfect, soundstage seems to be pretty much totally missing but they are bluetooth iem's. Bass seems like it's probably a little heavy, maybe it's my ear placement, maybe it's because I'm an Audio Technica guy but they sound pretty good for what I use them for. Anyway, you can use the app to apply an eq to them and it keeps that eq setting until you change it again with the app.
I can put them in, watch a movie, listen to music and walk around the house, play a video game on my laptop, or turn them down low and sleep comfortably without them falling out or disturbing me while trying to fall asleep. Almost perfect for 100-130 dollars. The sound is good enough but don't expect them to sound like audiophile wired headphones. The air isn't there in Norah Jones' voice, the separation of instruments isn't there in anything, the contrast of sounds in Marilyn Mansons Dope Show isn't quite there either but it sounds really good, bass is deep and fast, Sublime's Don't Push/5446 sounds great on these, Mayonaise by Smashing Pumpkins sounds very good too, eq'd differently. Anyway, these I'll use more than all of my wired headphones so I'll keep them because they are pretty good and very convenient.
I hope the batteries last but if not I got the warranty for a reason and I usually never buy the warranty on anything.