I'm also skeptical that any SP4's fully and completely work as they should. Mine wakes a little over half the time without the keyboard cover attached. It virtually never wakes on battery, with the keyboard cover attached, and after sleeping again after
one successful waking, whether that sleep is induced by the power button or closing the keyboard cover. (It will wake the first time after sleep most of the time, but almost never afterwards.)
Twice in a two-hour span this morning, I was forced again to hold down the power button, wait for a reboot, and re-launch all my apps to get back in a few minutes to where I should have been in a second or two, max.
I really want to love my SP4, but because of these power management issues, it is the most unreliable, least useful, least usable, and most deceptively advertised computer I've ever owned. (Remember, the ads for this thing show users happily and instantly
doing things like launching OneNote to take notes, opening the cover and instantly working, etc. And the battery life is claimed to be better than the SP3 - what a sick joke on us - my SP4's battery life is a fraction of my old SP3's.)
"Upgrading" to this pile of cr4p is the worst computer decision I've ever made, and Microsoft and Intel aren't even willing to own up to the problem, much less fix it!
I'm one of the least litigious people you'll meet, and would normally oppose a class action suit, but it's time, dammit, especially since MS won't even acknowledge all of us that have computers that are effectively useless - mine is really only usable as
a desktop when it's docked - I absolutely cannot use it as a mobile/portable computer. (Which again, is a far stretch from what's promised in the advertising...)