The glasses’ technology generally works well. They pair over Bluetooth to your phone and act like any other wearable. They show notifications, can call an Uber, and have Alexa built in. They’re controlled through a ring called the Loop, which is both a joystick and a button. The Focals won’t replace your phone, however; they are merely an accessory for it.
Both the glasses and Loop charge through a special case and proprietary system. That case charges over USB-C, but it should be set up somewhere permanently because the glasses and Loop require nightly charging, which I sometimes forgot to do. Plus, the case is bulky, and you won’t want to carry it around with you. I got about a day’s worth of use out of the glasses, but they’d die the next day without an overnight charge.