I feel the same way about the Surface 3 Keyboard. I wasn't going to buy one initially, but the cheapest (used) SP3 came with one. Really give me the best of all worlds - tablet for media consumption, detachable keyboard is a viable laptop replacement (trackpad is not great but usable), and the dock gives me a decent desktop replacement (Quad-core i5/8GB RAM/Gigabit Ethernet/USB3/Mini-Displayport gives me everything I need for anything except gaming).
I've also been impressed with MS's customer support - the tip on the Surface Pen broke, and getting a new one UPSed to me only took about 20 minutes (register serial number, then a quick live-chat on the support website).
I've also been impressed with MS's customer support - the tip on the Surface Pen broke, and getting a new one UPSed to me only took about 20 minutes (register serial number, then a quick live-chat on the support website).