I had a lot of reservations about buying an off-brand replacement charger for my Surface Book 2, but after reading other reviews that were all positive I decided to give it a shot.
When the product arrived I still had the old (damaged) charger cable to compare it against. The replacement definitely used a thinner wire, which I thought was a bit of a red flag, but so far it is working perfectly. I have not had any issues with the charger since then. It has all of the same functionality of my old charger, including the same style indicator light when it is charging my laptop.