I use version 3.1, it's o.k. I won't be buying from Xara again.
(Off topic) I bought version 2, two months later they released it to a magazine as a free full app. I bought version 3 a year later the same thing. So on that basis I guess you have version 4 I am waiting till next year for a free version of 4.
It is low quality output, plugins into frontpage and dreamweaver (I think it plugins into) has some good roll overs, crap graphics, good for editing errors after you have created a design.
Personally I would not pay for it again.
I have Xara webstyle V3.1 and Xara 3D 5.02<--this is what is worth monies.