The bathroom had widespread, visible mold, so I’d give the whole experience a 1. That and the bathroom light switch fell out of the wall, leaving exposed wires.
The mold could have been easily taken care of with a simple scrub brush and some cleaner with bleach, so I’d chalk it up to lax housekeeping, poor management or a negligent owner—or perhaps all three.
Personally, I’d find another place to stay unless future review indicate that the property is up to at least a minimum standard for cleanliness and maintenance.