ZipGenius: File compression utility
First, let's start with the good. It does what it says it does. It supports up to 20 formats for decompression, including 7z, and can compress in about as many formats as most of its competitors. Its graphical interface is very "XP" in every sense of the word - which is nice if you like that look. Fortunately if you don't, there are skins available. The utility is straight-forward, easy to use, and best of all, free.
The bad: during the installation there is an irritating pop-up prompt after the license agreement that verifies that you are responsible for all damages as a result of using this program. Quite a turn-off. The fact that it even has skin support might seem like excess, considering that a compression utility is not something you spend a lot of time looking at unless you like compressing and decompressing stuff all day.
The worst part, however, is that there is nothing that really sets ZipGenius apart from its other competitors. 7-Zip and ALZip do almost everything as good or better than ZipGenius. But, that is not to say that ZipGenius isn't a fully fledged compression utility. In fact, if the other utilities weren't available, this might even be a good choice.
Overall, ZipGenius is okay. If you like a user-friendly interface and enjoy skinning your compression utility, ZipGenius might be for you. But if you're looking for pure function and power, the alternatives might prove more rewarding.