Both viewer and premium editions of Word To Go read in documents failrly quickly and the equation rendering is very good. Unfortunately, if you upgrade to premium you loose the ablilty to have the line wrap around adjust to the magnification of the doucument so you have to slide the doucument to the left or right to read. Perhaps this feature can be enabled on the Premium Word To Go. I don't know how. I have reinstalled the viewer edition so I now have the two versions. One to view and one to edit documents. Unfortuentaley both icons look the same. Although I know which is which, is there a way to alter or customize the icons so that they look different (I guess for aesthetic reasons)? Also, I would say that the renderting of power point slides on Slideshow To GO, if you are showing equations, is not that good.