Advantages: it works, no unnecessary gadgets for PC keyboards. "historic" interface accessible for dinosaurs accustomed to former windows.direct x 11 for players. Recognition and updates drivers helped by windows update if necessary. The 64bit Version recognizes the ram> 4GB. Installation is very easy ... The settings are, I think, more accessible for all. And in 3 years of intensive use, no major problems, apart from equipment (hs motherboard, and reactivation of my license has been possible to a new card via the PLC microsoft phone).
Disadvantages: It pays, and it's too expensive despite, admittedly a big support microsoft.
Bone is rather greedy, win 7 on an old pc or small configuration (netbook-type atom), it will not be possible.
Note: To those who complain of licenses sold by the association on ALAIN marketplace, it seems clear that a license is bought from a serious seller, so Amazon.com.