Have you tried it out .. and if so, what do you think?
I've played with previous builds of Windows 10 a little, but not this new one. I think Windows 10 may turn out to be quite good. Certainly Microsoft needs a winner this time -- Windows 8 was pretty much a disaster like Vista. Which incidentally is a shame because under the hood, Win 8 is actually a perfectly fine OS. It's only the GUI that sucks for so many people.
I'll be honest -- I'm a Win 7 fan today. That could change after Win 10 comes out and I see what they've settled on.