I purchased these in September of 2017. They arrived within two days. Brand new packaging. Charged them and they synced and worked instantly. In March of 2018, I started having some issues. Nothing major. Sometimes the sound would go out in one or there was static or sometimes you would hear a pop sound. They usually adjusted themselves by the next day or with a rest and a charge. By June, one side went out for good. They were still within my 18-month warranty. Anker customer service were awesome!! They heard me out and sent me a replacement almost immediately! I'm very happy! Thank you Anker!!So, i'm not an auidophile by any means. I can't tell you that these are the best in the world because I wouldn't know. But, they are worth the price, and they get the job done. Bass? Don't really need a whole lot of it. Besides, I don't need IMAX theater sound in my ears when i'm listening to audiobooks or Pantera! Well, maybe Pantera, but their loud enough without busting my eardrums! They're also perfect for blocking out the world. They are not 100% noice cancellation, but they work well for ignoring others!I love that these don't fall out of my ears. They're comfortable to wear. They are sweat resistant. You can run and workout with these. They usually fully charge within the hour or less for me. The battery does last. I've tested these on more than one occassion working a 12-hour shift off of one charge. When i'm talking on the phone, no one has ever told me they couldn't hear me, nor have I ever had any problem hearing anyone on the other end. Everything sounds clear.Another thing I like about these, is that I don't have any problems with bluetooth reception. I can have my phone in my back pocket or in my front sweater pockets and I still get full reception. They are great in open spaces. I've left my phone at my station in the back of the warehouse, walked to the front, and still had full reception. As far as connecting to more than one device, that's not really an issue for me. If i'm at home, i'm synced to my laptop and when i'm out, i'm synced to my phone. I don't need to be hooked up to several devices all at once.So, if you want something state of the art::: concert or movie theater sound quality, 100% noice cancellation, can sync up to multiple devices all at once, that you can swim in, or earbuds that can cook, clean, and drive you around in! Then get ready to pay that HUGE price tag because these are NOT for you! If you're looking for something that affordable and meets your fundamental needs, while you're saving up or looking for something else in the meanwhile, then these are worth a shot. If they break for whatever reason, it's not going to break your bank. Seriously, you can't go wrong with their 18-month warranty. Anker customer service is awesome!UPDATE:In March 2019, one side of my earbuds went out completely. I contacted Anker Customer Service and was sent a replacement pair (green ones this time). I received them within a few days. Thank you Anker!! I charged them and they synced with no problem. I really do love these! These were definitely worth the original purchase. If this pair ever goes out for whatever reason, I will definitely re-purchase.