I have been using and beta testing room planner for about a year now, I am currently comparing it to a surface 3 pro for field use. I like it for the smaller kitchen and bath jobs, Saves me the trouble of redrawing in chief when i get back to the office. If you come up with a good system, its a great tool. There are some things it hasn't covered until recently, wall thickness is now in place, as well as better annotation tools. I like the system. But its still nice to have a paper and pencil handy if something strange shows up.