Amazing sound with high quality low-high drivers on these JBL's. Noise cancelling is best in class for these earbuds, and the pass-through mode for still hearing conversation with them in works very well.They last FOREVER. I work 12 hour shifts and can easily get through a shift with the bud in my right ear all day. Over my hour lunch break I put it back in the case and that charge is enough to get me through an entire day with no interruptions. In my experience the advertised 40 total hours of listening with the charging case is very accurate. I measured it at 38.5 hours with the volume set to about 80-85%. I'm sure you could easily get 40+ hours if using them at 50% volume.The charging case is great, feels very high quality. Charges wirelessly on a charging pad or with USBC input. Charges very quickly, roughly 1.5-2 hours for a full charge if you are charging them with a low volt charger as you are supposed to as not to damage the internal battery.*NOTE* please people, don't charge any of your earbuds of any brand with a 100 watt fast charger, you will damage the battery over time I promise.The JBL app is one of the best earbud companion apps I've used. It blows the BEATS app out of the water and is much better than the majority of its competition. You can change EQ, noise cancelling, and touch control programming quickly and easily.Speaking of touch controls, they are located on the stem of each bud and work very reliably in my experience. 1 tap for pause, 2 taps for skip ahead, 1 tap hold for voice assistant. 2 taps then hold on the 2nd tap for pairing mode. Haven't had any issues with accidental touches over the last 6+ months of using them every day.The sound profile is rich and deep, with these high quality drivers after Harmon kardon joined with JBL, they are much more well rounded than anything else in the 150 dollar range. Highs are crisp and satisfying and lows have a great little rumble without muddling the mids. Soundstage isnt too open like you get with some of the partial In ear designs but doesn't feel closed off and stuffy either. My father in law was an audio engineer in Hollywood for 40 years and worked for almost every major band under the sun as well as the Jimmy Kimmel show for many years, and when he tried these out on our last visit he was genuinely impressed. He is normally a Sony or Bose guy but expressed interest in buying a pair of these for around the house.As far as fitment goes, I go with the middle sized silicone tips and they work great for me. There are small, medium and large tips that come in the package. They are more comfortable than the beats I have and far more comfortable than my airpods pro. I can use them for 12 hours straight without ear fatigue. They are ported enough where they don't feel stuffy in my ears and don't make my ears itchy like most other buds do after only a couple of hours.Overall, I highly recommend these earbuds from JBL. They are the best value for money in this price range--bar none. I would take these all day everyday over my airpods pro and that's saying something as those are no slouch either. If you are on the fence about these, I'd advise you to just buy them and see for yourself. As someone who uses earbuds for 12 hours a day, 48 hours a week, these are my go-to buds and I've tried at least 20 other models from all the major brands.