So far I've been pretty happy with this. I've been looking for a battery pack that had at least the following: - Able to power my laptop - it doesn't charge via USB-C and it's a Lenovo that seems to draw, at peak, ~110W, so I need the power brick :'( - In a form factor I can throw in my backpack - Can charge from an existing power brick I carry around anyways. The Omnicharge Ultimate certainly answered this need. - It provides an AC outlet, so my laptop is happy. - It can charge via USB-C, so I don't need to carry around a third brick just to charge this on the go. - The form factor (compared to other portable battery products) also makes it fairly easy to throw in a backpack. Just be aware that it's a large capacity battery so it's a little heavy -- but really, you're looking at a battery of this capacity already, it comes with the territory. If you plan on flying with this, take note that this is a pretty high capacity battery -- 142Wh! Seems like United and American Airlines are fine with the size in your carry-on, but you should check with your airline.