None of the three tools will be unfamiliar to regular users of Microsoft Office, since the interface has been pretty much replicated in all three cases. Moreover, the amount and quality of the features is also virtually identical. However, you will notice a difference in performance, because Kingsoft Office is fairly light, and opens documents with surprising speed.
The three applications are compatible with any file 'doc', 'xml' and 'ppt' file, and you are able to save everything you do in one of these formats. Although, of course, it also has its own native format in which you can manage your documents. Another great feature is the possibility to export your work directly to PDF documents.
Another interesting tool in Kingsoft Office allows you to encrypt important files so that only you can access them using a password, a very important option for sensitive files.
Kingsoft Office Suite Free 2012 offers everything you could possibly need to carry out your work: a tool for editing text, spreadsheets, and one for creating presentations. An all in one programme for students and workers alike.