I have the 10,400mAh one, 10/10 for meeting its specs.
However, it weighs over 250g - 1/4 kilo! Also very bulky.
If you want/need 10,000mAh, nothing can be done about the weight or bulk.
But I would recommend the 5,000mAh variant, with a form factor like a phone and similar weight. Bought one for the wife, wish I had that one myself now...