The overall design and build is good. Each bank of chargers (USB, 110V AC, and 12V) has its own power switch and there's a switch next to the display that turns the unit and display on. The display clearly indicates which banks are turned on, as well as % charge, demand wattage, and number of hours left. The latter is pretty useless, since it's entirely dependent on the number of banks turned on as well as the drain curve. Each port is clearly labelled, which is nice, because the USB-C ports take different loads. The AC ports are labelled with the maximum wattage. The LED light on the end is very bright adjustable. There are two DC barrel jacks on the front - it's not really clear what these are for. Also, you can charge with a combination of the DC adapter and USB-C, but these is rather a bizarre setup - I can't see doing this to save a couple of hours on charging. The other quirk is that the instruction manual says it can't be used to jumpstart a car - this would have been nice, since I'll be leaving it in the car. Maybe it has something to do with the batteries or the circuitry; not sure, but it would have been a nice feature. All in all. it's a good unit that's already come in hand a couple of times. It has some really nice features, and only has a couple of minor design flaws. Well worth having for mobile charging and emergencies.