I must say I really like Windows 10, but have had two different experiences ..
I purchase a NEW HP notebook a couple of weeks ago "pre-installed" with Windows 10, and it is fantastic.. I love it including Windows 10
when it arrived it had v1511 installed but did the update to v1607 "Anniversary" update... the update went smooth, took about an hour, and so far after 3 days it is absolutely perfect...
My 5 year old HP notebook was upgraded from Windows 7 to Windows 10 using the free upgrade, again went very smooth and on the whole worked great apart from one issue....
If I put the notebook in sleep mode and then opened the lid to wake it I got a black screen and had to press the power button to get it working.. I tried all the fixes and not cured it... So I have restored it to Windows 7..
What I may do is do a clean install of Windows 10 and see what happens..
What I have noticed is that most people with issues with Windows 10 have
UPGRADED from another Windows version.. I suspect that Microsoft are saying machines are compatible when some are not 100% happy...
I have found very few issues reported on new, out of the box machines..
As I say I am 100% happy so far with this new notebook...
Stuart