Wall-mount lavs make small baths look big by opening up floor space. Problem is, they lack the storage capacity of freestanding vanities. Not the Happy D sink, which has an attached cabinet that hovers above the tile, rather than resting on it.
If it is renovation time and you have a tiny bathroom or ensuite that needs to somehow magically become bigger - then read on - this in depth step-by-step post is for you. Chock to the brim with good info by the time you finish this post you will be.