I'm doing a full renovation of a 4 x 8 foot "Master Bath". Given the small size of the room, I want to do all I can to make it feel bigger. So I plan to do a curbless shower. The shower is 48 x 30. I know that you have all dealt with the problem of the floor thickness and the transition back to the main floor level. I guess I'm trying to avoid it but I've seen a product that I think might work for me.
QuickDrain makes a product called QuickSlope QS30P. It looks like a lighting eggcrate panel with slope to it. It is set in and then filled with thin set. This would give me the slope I need with only a 1/2" + of thickness. Setting a cement board on the rest of the floor would bring the bathroom level and I can easily make a threshold transition at the door. I plan to waterproof the floor and walls with Laticrete Hydroban and then thin set my tile.
I assume that you will think this thin system is asking for trouble, but wanted to hear your thoughts.