I purchased this headphones years ago and they work fantastically well. The sound is fantastic, the long lasting battery is just great. How can I say, the sound of this headphones even without the soundcore application competes with any other big names brands ( recently tried the Bose 700 and the Sony WH1000 X5).It certainly sounds fantastic. The comfort of this headphones is something I didn't value till I tried the other products I have just mentioned. It is something that the Bosse 700 or the Sony X5 headphones can't match. So, it's a very good pair of headphones. Thought, if you want them to use it for calls in a busy office, get the Space Q45. Those headphones do a better job job in terms of noise handling ( you can be heard clearly in a busy office) and noise cancelling... it's a very high quality product. The only thing I would have liked to see is a fancy headphones case just like the ones used by Bose or Sony. Through, of course that will increase price. It's just that it makes the product experience much better and it's just a pity because this product can compete with the best fancy and expensive brand names headphones. It feels cheap in the box they originally come, but the product is high quality. So, despite this last small constructive crticism for the company. I can tell you that if you buy Anker you're buying long lasting high quality products ( I also owned the souncore Boost speaker and sound core Boom)for a very good price. Yes,it last longer than any other brand because their long lasting batteries make the product fully usable for much longer.