Not sure about the reviews on this thing, but I know for a fact that is hefty. Please note that the PD is only 100W, but still more than enough to power a big laptop battery.
Battery Capacity 26,800mAh
Input Type-C PD 5V/3A; 9V/2A; 12V/2A; 15V/3A; 20V/3A (Max. 60W)
Output Type-C PD 5V/3A; 9V/3A; 12V/3A; 15V 3A; 20V 4.35A (Max. 100W)
Output USB-A Quick Charge 3.0 5V/3A; 9V/2A; 12V/1.5A(Max. 18W), USB-A + Type-C Total Output = Max. 102W
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the USB PD spec tops out at 100w, so I'm not sure what you mean by "only 100w" - that's the absolute maximum.
most other power banks i've seen max out at 45w, or if 60w if you're lucky… 100w is huge :)