I am impressed by these earbuds.
I wanted earbuds I could wear to the gym without them falling out or bouncing around. Also, earbuds I could sleep in without having to search the bedding for them in the morning or accidentally triggering features with my pillow.
Fit - The buds come with several ear tips including a "cloud foam" tip that fits a lot like a soft safety earplug. The foam tips were not ideal for my waxy ears, so I won't be using them, but the typical rubber ones worked just fine for me in terms of fit and sound. Also, the loop that goes around the ear does not actually make contact with my ear or my head which is fine as it won't cause any skin irritation, but it would still definitely keep it from falling off if it became dislodged from my ear. It's flexible and soft so you won't be jabbing yourself taking them on and off.
Sound - The sound quality was great with no tinny noise and a good bass sound. The noise-canceling is decent. I like the Be Aware feature; I tested it by going outside with my music on and detecting the normal noises around me. I was able to hear the crickets in the grass and even locate them on the lawn. I was able to have a clear conversation with my relatives without stopping my music. There are three equalizer settings, but I found the signature equalizer setting was the best for my music. I was most pleased that I did not hear any whining or whistling from the Bluetooth when I had no media playing.
Construction - The case is large (about 3x3.5x1.5") so it might fit in a man's pants pocket, but would not fit in women's pockets and would be a giant space-eater in most purses. The charging cord is very short - only ~5.5cm or ~2.25in, but at least you always have it. It does not have a power-out option to charge other devices as some cases do. Overall, the earbuds and case seem to be of good quality and don't seem particularly fragile.
Range/Connectivity - Pairing was extremely easy and instantaneous. I had no difficulty pairing the earbuds to each other or to my iPhone 6. I found that these performed similarly to other Bluetooth devices in that I could leave my device in a back bedroom and wander the house without interruption, however, a closed door could make all the difference.
My one warning: Voice Control, while it is easy to access by double-tapping the left sensor, has many downfalls and once a command has been detected, it is difficult to cancel. It is important to note that this is reflective of your media device and not the earbuds. When I tried to "power off" and "goodbye" as voice control commands, I accidentally initiated FaceTime calls with three different people whose contacts share no audible similarities with "power off" or "goodbye" so...
Anywho, I would not hesitate to recommend these earbuds. I'd never heard of "JLab" before, so I was skeptical, but they've outperformed my Anker Liberty 2 Soundcore earbuds by leaps and bounds.