This dock is currently the best on the market. It's reliable and offers speedy connectivity, overall better than other docks. It works with any recent Mac or PC with a built-in Thunderbolt 3 USB Type-C port.
It offers an SD card reader, USB3.1 Gen1 ports, 2x TB3 ports, miniDP, GbE ethernet, FireWire800, S/PDIF for digital audio, and 3.5mm in/out jack. Do note that due to all this I/O, the dock requires its own AC adapter.
It can deliver power to charge your laptop, and you get a 0.5m USB Type-C cable in the box. Definitely worth the price, if you're a working professional.
Matt Granger sums it up quite nicely in the following video: