Update: Again, TOZO customer service is excellent and responds to any issues quickly and positively. They replaced the charger case with a new one where the charger lid pin problem appears to be corrected and should not be an issue for anyone buying their product now.For battery life, I use these ear buds 1-3 hours a day every day and only need to hook up the charger case to recharge it about once every 13-15 days. Very pleased with the battery life.Original Review:I got these TOZO NC9's because my Cowin over-the-ear noise cancelling headphones (which I really liked) started having problems after 4.5 years of use and pretty extensive traveling with them.This is the first set of wireless earbuds that I have owned (although I have listened to my friends' Apple and other earbuds also) I have to say that I really love, Love, LOVE these noise-cancelling ear buds! I appear to have pretty average/standard ears as the buds fit very nicely and securely in my ears and I'm using the default ear tips. As they come with six different sized eartips, there is probably one set of tips that will work for you (or you might even want to use a different sized one in each ear if your ear canals are exactly symmetric).The sound from whatever device you're connected to is very rich and clear, and you can easily pick out little background noises and stereo motion cues with these earbuds that you often can't pick out when listening to your TV's or tablet's speakers. Both Bass and Treble are great--every bit as good as Apple ear buds but for quite a lot less money! No sense giving your money over to Apple executives' bonuses and shareholder dividends when you can get a great non-Apple product for considerably less and keep that extra cash for yourself!The controls take a little bit of getting used to them, as some commands are done on the left bud and others on the right bud and initially I was getting them swapped or tapping once when I needed to tap twice. But, the buds 'talk' to you, letting you know the noise-cancelling mode that you just switched to, so if you did the wrong command, you can quickly correct it and then do the command you originally intended to do. Once you've used the buds a couple times, the commands fall into place.My primary purpose for these earbuds is for travel on planes and trains, so the noise cancelling aspect is important to me. I haven't been able to test them out on a plane or train yet, so I did something a little more demanding: I wore them while mowing the lawn for over an hour. I normally wear ear plugs while mowing the lawn, but it turns out that these earbuds with noise cancellation turned on do a much superior job to my ear plugs--plus I can listen to music, podcasts, radio, books-on-tap, or whatever while I'm mowing and can hear it all very clearly and easily with the mower noise muted in the background. I have also been using the earbuds to stream video while I'm using my (noisy) stationary bike, and appreciate the noise cancellation and clarity of the sound while I'm exercising--it certainly makes the time go faster and more enjoyable with the clear sound versus using my Fire tablet's external speakers while they compete with the noise from the bike (and no more need to have captions on or have to jump back 10 seconds because I missed some important dialog)!I have connected these buds with a Fire tablet, Samsung Smart TV, Samsung S20 phone, and Dell XPS laptop. All these devices connected easily and without problem, did not drop the connection (unless I walked out of range, but if I got back in range within several seconds, the connection picked right back up), the sound only glitched occasionally when I was at the edge of range (but still better performance than I expected and certainly better than my Corwin headphones). I also made phone calls with these TOZO earbuds, and they work really well--most people did not even notice when I switched to the earbuds in the middle of the call.I haven't timed the battery life yet, but it definitely outlasts the battery on my Fire tablet while streaming movies, and the charging case tops off the earbuds whenever you put them back into the case. The case has battery level lights on it, so you also know about how much charge is left in the case before you need to charge the case up again. I've had the buds for about 3 weeks now, and have been using them 12 hrs/wk and will probably need to plug the charging case in for the first time this coming weekend.I haven't tried out the waterproof feature yet, maybe when summer rolls around...I've only experienced one small problem, and that was with the charging case. The little pins holding in the hinge for holding on the lid started working their way out, and I did not notice this until the lid came off and it was too late/too hard to push the pins back in. So, you might want to check out the charging case hinge and see if the pins on yours have shifted--if so, you can probably get something like a toothpick, fork tine, or a eyeglass screw driver and slide it back in really easily. It's unlikely that in normal use the pins would start to come out a second time. TOZO customer service was immediately responsive and has helped me out with this issue.Lastly, I like their selection of colors--so much more interesting than just white or black.