is the exact same thing they said about every previous release. "They got it right this time", "they finally fixed all the bugs", "it has a few bugs that will surely be fixed quickly"...
I'm pretty sure you could copy and paste 95% of the content from reviews of Windows 95 right into Win 10 reviews and nobody would blink an eye.
[NB. I have been testing Win 10 on non-production desktops for a few months, and I kind of like it. Despite having 20 years of linux experience and being a Java/Eclipse/J2EE "expert" I spent most of last weekend running Visual Studio 2015 on a Windows 10 VM and I didn't feel the need to scrub my skin clean with coarse sand, so things are looking pretty good.]