I still have some assorted, random issues, too (most recent firmware version). My major sleep issues appear to have stabilized, though it still occasionally does not sleep right (drains too much battery, stays or gets too warm at the same time). I also still have video driver issues with the Intel graphics driver (artifacting in Firefox with hardware acceleration enabled -- this is less than before, but it still happens, among other little graphics driver glitches).
A few notes:
1) Haven't seen a BSOD in awhile. I noticed from my event logs that I rarely actually see these anymore when they happen, as they tend to happen when the machine is waking from sleep, so the screen just never comes on and I just end up forcing a reboot only to find a BSOD error in the event log.
2) Major graphics driver instability has improved quite a bit. A lot of the bugs I had with the intel driver have been improved. It isn't perfect, but it's better than before.
3) Windows Hello has been working with 100% reliability (as in, it successfully turns the camera on). Every once in awhile, it decides it cannot recognize me, but that failure rate is extremely low.
4) Attach/detach. I've been making a point to do this more often, and have noticed that my previous issues with getting a black screen on detach or attach has dropped to almost never happening at all.
5) USB/power issues. This thing still doesn't handle a lot of stuff flowing over its USB3 hub. Plug too many USB devices in and throughput is terrible compared to previous Surface devices. I can't use it as a desktop replacement for this reason.
Overall, performance of the SB is still sub-par to me, despite the improvements. I still feel like I'd have been happier sticking with my SP3 and waiting for next year's Surface lineup. I imagine that I'll end up holding onto this SB for a long time, though, after how much money I spent on it. Surface Book is OK, but it should be much, much better than it is.
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