Not Bad
Win10 preview is on my older laptop now, and (perish the thought!) is not bad at all. Partly because it seems to have imported from some 'Cloud' all my XP-like customisations of Win8.1.1, including unasked even my screensave private pic. That makes it nice to use, but impossible to test on behalf of newbies because I can't see what they'd be confronted with after a fresh install