Either Microsoft sorts this out or Apple for me next time
Have had Surface Pro 4 for a few months. Ended up with hot bag syndrome a couple of times and the thing fell asleep and locked up until power button pressed and held to reboot system.
I don't put the thing to sleep much and tend to turn it off fully - to avoid the sleep of death issue so haven't had too many problems. When the thing does play up, detaching and reattaching the keyboard sometimes works.
I've kind of come to regard the Surface as a keyboard-less laptop and not a tablet. Battery life is not too good and nowhere near as good as my iPad mini - which wakes up unfailingly when I hit its button.
Despite the hassles, I like the Surface Pro owing to its ability to use real windows - something which Android and iDevices can't do.
Hopefully Microsoft will sort this sleep issue out or else I'll go for a MacBook Air next time. In fact, I kind of wished I'd opted for a MacBook Air anyway - I'd miss the touchscreen though.