Once you install then you will get whole Windows 8 like Metro UI feel on your Windows 7 machine.
Once you install this skin pack then you will get new Boot Screen, Wallpapers, Sound Scheme, Icons, Logon Screen, Dock, Theme, Cursor pack and lots more.
Following is the screenshot of this skin pack :-
You can install it on Windows 7, with or without SP1 on both 32 Bit or 64 Bit.
P.S. Make a system restore point before installing this skin pack, if anything went out of plan then you can easily switch to stable stage.