jZip is an extremely fast file archiver and extractor. The main drawback is that will attempt to install third party toolbars/advertisements, but you can cancel these installations during the setup.
It has an excellent speed of compression and this can be very helpful if you create archives often and you work with many files.
It can create ZIP, 7Z, GZIP and TAR archives - enough to work with best types of file archives (see our tests regarding best compression format). It cannot create RAR archives, but only WinRAR can create this type (.rar is under their paid license).
It handles popular archives, but doesn't recognize ZIPX archives (a newer and pretty good format created by WinZip).
jZip it shows compression ratio fro each file within an archive, you can split an archive into multiple parts (zip.001 ..) based on size and encrypt with password.
At Preferences you don't have too many options, but you can associate the program to be default opener for specific file types, change the size of toolbar buttons and change view mode (details, icons, list ..).
A very good product with excellent performance, but you need to pay attention at installation to cancel installation of third party programs (toolbars, browsers etc).