I’ll start with the cons for people who need an honest review, it *can* charge slow, and it IS bulky..
If you use the short cables attached that can be slow.. I’d suggest using your phones charger like an apple charger, android, etc. etc. Oh and another thing, it shipped very quickly for me, just a day or so, that may vary on where you’re from. And when charging it (it being the power bank), it charges somewhat quickly, so even though it *can* charge your devices slow, it tends to charge quickly and hold its charge until use.