I have had pretty good luck importing the cad file. Once the cad file is imported for a floor, and the scale is confirmed, I use CAD to walls, you map which layers are wall layers, which are doors, windows etc.
Most times chief does a pretty good job of converting the CAD to chief objects, and now I have a floorplan with exterior walls, windows, doors, interior walls. Usually the measurements match up too. Sometimes it will change windows into doors. Then I just need to modify the windows and doors.
Then I create the next floor, import and repeat. I usually build a corner of an exterior walls and line it up with below, then I can move the imported cad file as a group with a point to point move so it matches with the floor below before I convert cad to walls. You can also convert first then move all the objects.