I was so happy with these initially. The sound is wonderful. I also experienced good battery life, unlike some of the other reviewers. However, look carefully at the design and you'll see they are much bulkier than most similarly targeted headphones. And there is the problem. The larger, bulkier design seems to give the earphone momentum when you move and it shifts position and then will fall. At first, the problem was less, likely because the silicone was new, but with some use, they simply won't stay in my ear for any length of time during exercise activity such as jogging, running or jumping. I tried to adjust them somehow to stay in better, but there is no real way to do this. Other earphones I have are much better in this area. So while the sound is great, and I love the clarity and volume, these need a redesign to actually stay in the ear while the person is moving. If they did that they'd be a 10 out of 10. But since they don't, they are a fail for use as exercise earphones. It isn't practical to keep stopping exercise to pick up your earphones.5 stars for the price. There are better headphones but not many with this quality/dollar ratioUpdate: 2/13/2021: I have used this wireless set, daily, since October 2020. After using them for one hour, I have fo charge them for six to eight hours. I'm disappointed because I truly thought that I found a replacement for my Plantronics. Back to the drawing board...____________________I LOVE this wireless headset!!! My five y/o Plantronics quit working. They were my favorite headsets to date. I tried earbuds and around the earphones, but nothing compared to my Plantronics.Since Plantronics has changed ownership, I was a bit skeptical about going back to Plantronics. I knew Jabra was a great, reliable, brand. So, I did some research on weight, sound quality, battery life, and which product would work best for me.These are amazing and keep up with my everyday usage. I'm a SAHM, I work from home, go out for walks and listen to my favorite shows while doing the housework. The Jabra Elite never quit and did not overtake on noises around me. For example, the two products I bought before made it impossible to hear my kids or husband when they asked me a question.The only issue I have is the comfort of the earbuds. I had otoplasty in 2003, and my ears are super sensitive. My Plantronics were lightweight and I hardly felt them.I hope this review helps! ?-fit very poorly for me. Start falling off in runs and I have to keep readjusting.-difficult to connect to iPhone Bluetooth.-good battery life-pretty good sound all things consideredHonestly, at first, I really wasn’t sure I liked these. I couldn’t figure them out for awhile. However, after getting the hang of them, I love, love, love them!! The battery power is amazing. They fit so well in my ear that my sound quality is definitely improved. I hate ear buds that constantly fall out—that has never happened once with these. The app offers some very, very cool options (and that was another thing that I didn’t catch onto immediately); so I can hear in a human’s voice how much power remains when I first put them on (or I can use the default tone and look at the battery power indicator on my devices). My only disappointment is that the connecting cord seems just a little bit short? I’m used to being able to hang ear buds over my shoulder when not in use. That’s just my personal bug-a-boo. They are so good, I plan to buy another set soon.Cord that connects is extremely short. If you have a medium or larger head it may be a true handle. Unit snags my ears while turning head. I wear one in ear one on shirt. But then sound volume suffers. But greatly built an works great if standing still for me.No complains about sound quality. Main issue is the terrible cable design. It's short, stiff, and grippy, causing it to catch on my neck or collar. Tried running with this headset once -- every time I turned my head, the grippy cable would tug on one earbud and push on the other. Worse is when the cable pushes on both at the same time. Simply loading the dishwasher was difficult to do without both earbuds wanting to come out since every time I bent down, my neck/upper back would push the stiff cable up, which in turn would push the earbuds out of my ears.I had to return these because the listing does not explain that they are ONLY for mobile devices---You can't use them with your laptop or pc, or any other bluetooth device like a radio or the like.Very good sound quality, shipper was helpful and overall I loved these......Until I found out they wouldn't connect to my computer! Hate to return but I had to.