Full user review
"Better than Windows Zip utility"
-Supports zip, gzip, tar and others
-Allows for password protection of Zip files
-Helpful shell extensions
-Appearance is a little intimidating
I downloaded 7-zip the first time I came across a .tar file I couldn't open in Windows, and I've never looked back! Although there are, I think, more common archive utilities, I like 7-Zip because of the higher compression rates for its .7z format. Although the user interface is a little "old school," which makes it appear inaccessible, once I learned how it worked, I've never had a compression problem 7-Zip couldn't solve. I also appreciate being able to easily encrypt my .zip and .7z files, which I think is impossible (or at least impossible to find) using the zip feature that comes with Windows.