OK, I really wanted to give this 5 stars but I am taking one star away for one reason. Build quality. This thing feels extremely flimsy. They could have built this a lot better. It feels as if you dropped it on the floor (the hub), the plastic would crack. It also feels like the ports could break due to cheap construction. Otherwise the fit is perfect in my SP4. Has just the ports I needed. I wish they had this with HDMI instead of DP.

The new Bidul port replicator designed specifically for the Surface Pro 4 is perfect for those that do not want to fool with the bulky port replicator that Microsoft released. It provides you with an extra USB 3 port and adds a 1GB LAN and also maintains the mini display port. Compact design is perfect for the limited desk space I have with an extra monitor.

The only drawback of the Surface Pro is the lack of an Ethernet port and the limit to one USB port. This unit doubles the USB ports and makes connecting to the network super simple. Well worth the price!

I do not have WiFi, so this product allowed me to purchase Surface Pro and hard wire it to the internet. Surface Pro does not otherwise have ethernet port.

Great product to make a 2nd USB available. it's a shame that microsoft didn't make a USB-C port for the surface pro line.