I just had to post something about this. I made washable pee pads prior to getting June (got her a week ago) and have placed these strategically around the apartment.
Well, the little girl doesn't like going on them - I am going to try a litter box with sand in it as she always goes as soon as she hits the garden (we live on the 4th floor).
Cash finally got the outside potty thing just before we moved into the apartment and had trouble with using disposable pee pads, so he would go on my bathroom rug

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The irony is that Cash now uses the pee pads that I made! He uses them every time! Now just to find something that June will use.