Screensavers have become far more valuable aesthetically than as a way to actually save your screen. Snowfall Fantasy is one of the better screensavers because it hits both of those notes. It moves around well enough to prevent burn-in and is an absolute delight to look at.
The Snowfall Fantasy screensaver depicts a log cabin covered in snow that continues to fall. When you first install it, it makes itself your default screensaver. However, if you change your screensaver, it can be tough to find this one again in your screensaver menu. That means you're stuck with it unless you want to risk losing it. The static image of the log cabin isn't the best for a screensaver. However, the constantly moving and falling snow makes this screensaver work for the small number of monitors that actually need a screensaver to prevent burn-in.
Though you probably don't need a screen saver, this one is definitely worth adding to your computer. It's an absolute delight to look at and it works really well. That's a blend you don't get often enough in screensavers, which makes Snowfall Fantasy a download worth snatching up.