It's just OK.  There is a large paper template that sticks to the wall and you drill the holes.  Good in theory, but the sticky stuff that holds the paper up is super sticky and sticks to the wall.  I had to take a wet cloth to scrub it off.
The big bummer is that the bottom shelf fit fine, but there isn't a way for the top shelf to sit on it level based on the instructions where to drill the holes.  I had to just use the bottom shelf and luckily I had some floating shelves I hadn't hung up yet so I just hung them in the space where the 2nd shelf would have went.