We live in a multi-story house with a large property and no fences allowed (HOA). Our main level is raised more than a floor above our lawn Taking our 4 month old puppy on a leash to "go" outside a dozen times a day (and night) was hard on him and all of us. Porch Potty to the rescue! It's been flat- out amazing! He can sit in the kitchen by the door indicating he needs to go, we let him out, he loves the PP and goes instantly, he's so proud! It's not just for apartments and small spaces, it's great for larger homes with stairs and families with puppies who are ready for a little independence, like our sweet pup. Can't say enough nice things about our experience. (TMI, we used the technique of wiping a bit of his pee on the PP once- he figured it out instantly!) We have the artificial grass to start since it's cold, but will get live grass in the spring. Don't hesitate- best money we've spent in a long time!