Have bought the MIVI USB type C cable from amazon. The quality seems good, braided nylon cable works for some rugged use, been only 1 month but have taken it a lot of places (because of the Type C curse). Charging speed is good and data transfer rate is optimal for USB 2.0. Well worth for 399/- anything above that and it might not be so. Might be a snug fit when you use it the first time but it becomes comfortable after 2-3 uses.
Definitely Do not go for the official one, not worth it. slight pulls make the usb loose from the charger, and the quality is not worth the price.