I was hoping this power supply would offer the same performance as the Apple one plus have some useful USB charging ports. Unfortunately it doesn't do either of those jobs. The supply current to the MacBook Pro is limited to 5W which is nowhere near enough to power the laptop while in use. Instead the battery discharges. I was also using a USB port to charge an iPad Pro as recommended by the manufacturer, but that also does not supply enough current to keep the device charged while in use. I contacted Anker about this and did not receive a reply.