The Surface Book has had an absolute _pile_ of firmware issues. I have had two (obtained from Microsoft as prizes) and both have been buggy messes. One just refused to undock about 50% of the time, necessitating a reboot to restore undock functionality. No firmware updates ever arrived to fix it, and Microsoft support was absolutely useless on the matter.

I sold the other, and the new owner reported that it often woke up for no reason while closed, resulting in massive battery drain and a warm backpack. Also a known issue with no fix, and Microsoft support apparently didn't help either. (They decided to just "wait it out"; I sold it to them without unboxing it so I didn't know it had issues)

Also, touching on the touchscreen while in "laptop" mode was almost as bad as trying to touch the old Surfaces with the touch keyboard - the hinge strength is quite weak and the top is heavy, resulting in a significant amount of wobble. (Cue "it's not supposed to be used like that").

You get good experiences and bad ones, but the Surface Books have been more aggravating than not in my case.