The survey on this thread said to describe breakage. I bought a Surface Book and it had so many problems, it was beyond ridiculous. Screen blacking out, update-looping-hell, CPU burning hot with full fans for no apparent reason, etc. I managed to fix most of it by using sys admin commands to repair the file system and installing all updates. But I couldn't fix all of them and I sent it back. This was truly awful considering that Microsoft made the hardware, made the software and ran the store. The Surface Book had even been out for several months so there was time for issues to be fixed. Later I purchased an SP4 m3 from Best Buy with type cover and pen. I have had zero problems with that one. But it's underpowered and I only use it for browsing and note taking.