Vista panel is cPanel skin which is actually made by cPanel to provide a Vista feel to the users of cPanel
It is easy to navigate and has a simple yet good looking interface which provides the users with a feel of working at home
It also has a custom login screen and webmail login.
Fantastico which is one of the best tools in cPanel control panel is also supported by Vista panel :dancing:
It has these worderful features, however, you should make sure you will not get Vista panel for free as it is a licensed skin and you will have to pay charges for it :o