I think this is the only Big Lots I've been to in PHX -- and I've only been here twice. It's fairly ghetto, and right next to a sketchy Goodwill.
I didn't see it being dirty per se, but I did find it having a bunch of "lower quality" items -- especially in their electronics area, which is to be expected.
They did have some outdoor patio furniture, that seemed reasonably priced. I never thought of Big Lots for patio furniture..., but still wouldn't buy that here.