Today is the 4th time I've left Lexi loose in the apartment. I started on Sunday for 2hrs and then Monday for 3hrs. Yesterday and today for 4hrs. So far no accidents and she has not gotten into anything she shouldn't. I started thinking today if she keeps this up in a couple of weeks I might try leaving her out all day (with me coming home at lunch for an hour). By the time I get another puppy she might not need the exercise pen and I could use it for the puppy.