I bought TechMatte USB-C to Micro USB Adapter Convert Connector for Nexus 5X 2015, Nexus 6P, OnePlus 2, with 56k Resistor; Approved to Meet USB Type-C Standard (2-Pack, Black)
to be able to connect my new Nexus 5x with laptop. I had a USBA-microUSB cable already and I didn't want to buy a new USBA-USBC cable. After reading the reviews, and specially from [[http://www.amazon.com/gp/pdp/profile/A25GROL6KJV3QG/ref=cm_cr_dp_pdp Benson Leung]], I was convinced and bought it. I am happy with the quality and it works perfectly.
I have kept one in my office and one at home. I have only one rapid charger for Nexus 5x, which I keep at home. In office I have old Nexus 5 charger, which along with this adapter doubles up as emergency charger. Though charging with old Nexus 5 charger is slow because of limited current output, it does the work. I can use my laptop as charging source in case of emergency with my USBA-microUSB cable along with this adapter.
Very helpful and economic.