The English version is listed at US$29.95 (US$14.95 if upgrading from other vendors).
If you can understand Chinese like I do, the Chinese version is actually free.
It is based on Java but it is really very fast under Linux, much faster than OpenOffice. The compability with Office 2007 under Linux does not seems as good as OpenOffice. But it is said that the Windows version is actually quite good and they are fixing some bugs with the Linux version to catch up with the Windows version.
Take note you need to install unzip for the installer under Linux.