Has anyone tried this product? For $60 (at Amazon), it plugs into the side of the SP3 and provides three additional USB 3 ports. It also allows you to use a standard laptop charger (wall or car) with the SP3. For $85, it also adds an ethernet port. Review: www.pcworld.com/article/2882754/review-etauros-surface-pro-3-dock-is-cheap-fast-fat-but-flexible.html Basic unit: www.amazon.com/Microsoft-Compatible-Charging-requires-compatible/dp/B00PZE8MO2/ref=sr_1_5?ie=UTF8&qid=1431002727&sr=8-5&keywords=usb+hub+surface+pro+3 W/ ethernet: www.etauro.com/en/productdisplay/dp-usb-hub-charger-gigabit-ethernet-ducge Comments from owners appreciated.