Its just a 2 step pretty smooth installation procedure. Took me about an hour to finish the entire thing.
The theme and the UX looks similar to Vista with a few tweaks here and there.
The wordpad has the office ribbons and the calculator has a new UI with additional modes :
that would take you to the system properties . . . isn't that cool !!!
There are many other refinements to poke around so worth having a look . . .