Excelent product, works as expected.
I've tested USB-C ThinkPad.
High quality product.
So far I've tested USB-C ThinkPads and MacBook Air and it works for both.
I'm using a 20v powerbank with ThinkPad slim tip out, and this adapter allows me to charge my USB-C laptops from it.
Exactly the gizmo I needed to extend usage of my old Lenovo charger after my laptop was upgraded.