The manual clearly shows which cable you have as plug for different purposes. Unfortunately leaves USB OTG no simultaneous charging to - to move to simply plug the appropriate cable.
The charging current of about 2 A well Tablets or Power Banks warden charged quickly, for smaller devices reaches the port with 1 A.
My Smartphone past well into the cradle, both transversely and vertically, it does not slip. A blue LED indicates on the front, if the device is on or off.
I am very satisfied with the device.