If Evaluation Build 10130, the current iteration of W10. is any indication, it still needs some refinement before the final release. The start screen is still that smart-phone, icon-filed thing. My big bitch with W10 is the lack of a favorites organizer in Atom, the new browser. Everything alphabetical, no choices. The Atom browser is just a warmed-over IE. Other than that, it seems to be pretty bug-free so far. We'll see.