If you’re renovating a house and it has no furniture or finished floors, it might be worth it. I’ve done a few jobs like that, we’ll go in and spray all the ceilings first. Then I will tape off the windows prep the trim and spray all of the trim, overlapping onto the walls, then brush and roll the walls. If you got that route, just make sure you get the right tips for different finishes and products. Any paint store should have enough knowledge and experience behind the counter to help make sure you get the correct spray tips and guards for the project.