While the overall facility appeared to be clean, the unit had numerous flies flying around a couple of light fixtures (about 20 flies near each of two light fixtures). There were a number of fly ribbons in place, with dead flies on them. Two of the bedrooms had a strong odor of urine and weak odor throughout the unit as the days went on. Just about every room had air fresheners in use. There really did not seem to be any quick resolution to the odor problem, so we just put up with it. At least six smoke detectors started chirping, one or two at a time, over the stay. The owner's daughter came and left some batteries, and we had found two batteries. I think we used all but one, but as we could not really reach some of the detectors, we just knocked them down and did not bother to try to put them back up.