It holds enough charge to last my phone throughout a 3 day trip. The quick charge port charges the phone very quickly. The charge depletion of the powerbank also happens at a reasonably slow rate. Also, the ability to be able to charge it using any cable is a big plus.
Yes, the power bank is a bit bulky, but I like that. Unlike the slimmer power banks, this one has enough space to put a few 18650 battery and keep it going.
Overall, I really like the build quality, looks and features of this power bank and would recommend it.