Has anyone used an ozone machine?

Amber • Due with #3 on Feb 8th :)
It purifies the air getting rid of any smells or odors. I used it because I'm nesting and every smell is driving me crazy. I know you're not supposed to be in the house while it's going but afterwards is it ok? I know it leaves a smell afterwards but I didn't think it would be harmful. But my husband is worrying me