The Spectre x360 (late 2016) has a terrible problem with battery drain while the system is shut down. Just do a Google search for "Spectre x360 battery drain while off" or similar to see how widespread this problem is. Typical drain is about 12% over 24 hours while in shutdown mode. HP support forums are filled with people complaining about this and no solution which works. I've had three units now, all with the same problem. One was sent back to HP for repair. Took them two weeks, and it wasn't fixed. After my third one exhibited the same problem, the HP Escalation Team manager emailed me to say that battery drain of this magnitude while off is normal behavior. WTF? In other words, they can't fix the problem.
Quality control also seems to be a problem with these units. In the 3 units I've had, one had a loose trackpad which rattled, one had a defective camera that would not focus, and two had audio problems that result in the sound suddenly getting very soft or cutting out altogether.
These would be great machines if they worked. Sadly, they don't. Stay away. You might think about revising your review to reflect this problem.