My chi isn't experienced at all with a leash and my yard isn't fenced, so she goes potty on pee-pads indoors. There's no odor and it's a super easy clean-up. I just pop one in a holder tray and she's all set for the day. I work in a pet store, and every time we sell one of those grass training things, they get returned for some reason or another. That's just my input!