Very happy with this purchase so far. They hardly ever fall out of my ears. They wick pretty well. I wish they had active noise cancellation along with passive since I go to some pretty obnoxious gyms. However, the passive noise cancelling that they provide is excellent and I can not imagine something better and blocks out the majority of all passive noise. I'm a bit critical of hearing gym music, and at about 80% volume, I don't hear it.

Not only is the sound quality better, and not only is the charging case actually pocket sized, but they're significantly more comfortable and in ear canal buds so they naturally block noise.

The sound has rich bass, a nice mid-range and not-to-harsh highs. Great for working out or casual listening. Again, you get to set the tone, so it's up to you.
Build quality is very good. No complaints there at all. The headphones snap into the charging case with little magnets so its easy and sure.
Connectivity issues seem to be fixed with the latest firmware update, notified through the app, and was quick and simple.
I'd buy these again.

These earbuds are simply amazing. Pretty good sound quality, excellent noise cancelation and they fit like a glove! It's only after hours of sweaty work that they start to slip a little but with a quick wipe-off they are back to staying right where you put them. I HIGHLY recommend them!

I tried them at a few gym sessions. I have to clean my ears right before using them or they slip out, I guess my ear ridges are not quite ridgey enough. It stayed in really well, these are not quite as good in my ear, but good enough for me to be happy with them. I can run a few miles and maybe have to adjust them once or twice.