My closet system is four separate units that I butted up together and attached to the wall with a "decorative" 2x4 railing around the entirety of the closet. The main unit looks the closest to the real design but is 8 feet long and 8 feet tall to avoid extra cutting of boards. The smaller unit only has one area for hanging up clothes and is around 5 feet long which is just the length of the wall. I also built a unit for holding sheets and towels and another for my wife's shoes.
The plans are really easy to follow but I would suggest a few things:
-Do stain and boards before cutting; this would have been a nightmare otherwise.
-If you use the metal clothing rods (if I could go back in time I would have used wooden dowels) make sure that you put those in before you attach any boards between the support structures. I ended up having a 35 inch gap instead of a 36 inch gap and it killed my momentum.
-I made mine 8 feet tall because it was less to cut and then re-stain; time wise it probably was a scratch cause I had to build it in place and at the end it was very tight to work in the space.