I've always had trouble with it, unless the bed is in the middle of the room. The fitted sheet never wants to stay on the mattress. If one side of the bed is against the wall, it's impossible to get the sheets, blankets, comforters, bed spread, afghans, or whatever else, in between the wall and the bed. The flat sheet doesn't want to stay under the mattress. The bed spread or comforter doesn't want to stay smooth. When I was a kid, it took me forever to learn how to put a pillow into a pillowcase. I can remember throwing fits to this day just having to do that. I thought the whole process was invented to drive me crazy.
I am happy to say, I am slightly better at it now, but don't go out of my way to make it neat.