WAR: Moldings versus electrical outlet and switches
You have just finished reading my post about the beautiful decorative boxes in my living room? Perhaps you should read this as well.
Before starting boxes of your own you need to consider one more thing: the outlets location, which I did not do (as I started on the wall free of them). Big mistake. My goal was to have the same height from the ceiling to the top of the box, and the bottom of the box to the floor. I also measured a distance that I liked, from the corner of the wall to the side of the box and copied the same distance between the boxes of each wall. What can possibly go wrong? My first wall looked fantastic.
So the moral of the story: take into consideration your electrical outlets and switches.
As for my outlets, they are all hidden behind furnitures. But if yours are visible I suggest that you measure each of them first and making sure that they are either inside or outside your boxes. That being said, if your contractor was meticulous you won’t have to worry about that.