This is the best version of "WinZip' yet. Now that it's compatible with most "RAR' file types it's much better. In my opinion. there are only two compression applications worth investing in. The other is "WinRar'. Both work great with "Vista" so basically, it's the users preference. I bought "WinRar" before this version was released so I'll stick with it. If you need a free compression application, check out "7 Zip".