Based on the cost-benefit, these earbuds are very good, nice sound quality, nice microphones, nice technologies, and speed connection. The not-so-good part is that in my ears, the rubber models got bigger, so it's quite easy to have the feeling that they will fall off (mainly if you are thinking to use for go to the gym or run). It's comfortable, but personally, after 4 or 5 hours of use, it starts bothering. Excellent battery duration, 1 single charge in the case can recharge the buds 2 or 3 times, and the buds resist much more than I could test, after hours (maybe 5 or 6), it was still 30 %. Because they come from China, the order track is not so good, and it took a little more time than I expected (about 12 to 15 days). Still recommend it.