When charging my devices, it's great to have 3 different ports to use at the same time. They all charge at their own pace and it barely puts any strain on the bank. The bank also will shut off individual ports as the device being charged reaches 100%. This way I don't have to worry about overcharge.
If there was any drawback at all to this power bank, it's the size and weight. But to me that's not really a negative as I do have other smaller units that I can use when size is important. But when power is called for, this bank delivers it at a premium.
This is a great purchase.