just tried it...
wouldn't open an existing html file because it wasn't made in google web designer.... yeah that's great that is
so started a new page and made an animated 'text box' slide in from outside the screen... it worked fine but the id and classes were so much random garbage it was stupid, it also made everything coded for 'webkit' but it did still work in ie/firefox.
Will I use it again, not likely, but I can see a new 'market' popping up soon, google web designer templates....