I came from a pair of JayBird X2's - one of the top wireless headphones, that were $120 at the time of purchase.
The immediate problem with the X2's was the lack of ear hook: something that I seem to require on all of my personal headphones. Everything just falls out, no matter how much adjusting I do! So, kudos to Anker for helping a gal with big ears out, there...
I was also worried these wouldn't live up to the X2's sound quality, but I was proven VERY wrong. They sound incredible, and I couldn't be happier. No, they aren't some ridiculous Bose or similar headphones. But for when you're running your half-marathons or working out in the gym, you'll definitely be happy!
For 40 bucks, these were an absolute steal! Anker continues to pleasantly surprise me with ALL of their products!