The second ensuite is really taking shape now with all the plasterboard in place. Originally we were tossing up between villaboard (a water resistant under-tile cement sheeting product) or wet area plasterboard, and were glad we chose the plasterboard. With all the tricky angles and cuts that needed to be made it was a whole lot easier to score and snap the plasterboard than to don a mask and circular saw the villaboard. Remember even modern asbestos-free cement sheeting is dangerous to inhale because of silicosis etc.
We used Lafarge's Watershield, but there are several products on the market. Get it from a dedicated plasterboard shop, not the big shed where they have a limited range and in our case tried to sell us 'blue board' - a J Hardie product for exterior eaves that is often inappropriately installed in bathrooms by amateurs and provides really bad tile adhesion. The water resistant plasterboard is not waterproof so it still needs to have a waterproofing membrane applied over the top in shower and bath areas, which we will get to in a few weeks time.
This weekend: base coat plastering of the joints, limoncello bottling and a Christmas party :)