We stayed twice at the Sheraton because of it's proximity to the University of Iowa. After a disappointing first stay, we gave it a second chance.
One positive – the room had really comfortable beds. Too many negatives – a moldy, smelly shower curtain, a missing toilet seat lid, a missing room chair, a burned out light bulb, mold on the walls around the air conditioner (visible because of wallpaper peeling off all around it), a tub that water wouldn't go down in (can't figure out how the people who cleaned the room missed that) that was fixed after several calls, but dirty towels were left behind with the muck from the drain on them. I'm sure the Sheraton can do better than that. But we won't stay there again to find out.