In general, I found the user interface clean and easy-to-use--which isn't always the given it should be. There's not a lot of clutter, extra links, upsells, and so forth. It does have some decidedly don't-call-it-Metro touches, even on Windows 7--but this is the general design direction Microsoft seems to be headed in. Pictured, for example, is the main menu, which will send you to other Microsoft applications. For a service like SkyDrive, it seems like the design rule to live by is: Don't screw it up. And they didn't, in my opinion. I especially liked being able to toggle between list and thumbnail views when looking at Files.