I have a Surface Book (original). The first keyboard started failing for no discernible reason. The replacement keyboard, which also has a dedicated graphics card in it, disconnects from the computer randomly causing weird errors and OS crashes, so I have disabled the dedicated graphics card completely. If you scratch the outside you void your warranty, if you buy an expensive warranty it is expensive and still does not last very long.

2 years ago I thought it was an acceptable risk to buy a laptop with a cool gimmick hardware part... I wouldn't do it again.