I live on the 11th floor of an apartment in downtown Los Angeles without any green space close by, so it's not super safe for me to take my 2-year old, 25 lb pug out when it's dark. And he just refuses to go out when it's raining. So the Doggie Lawn has been a lifesaver.
It took Charles a while to start using it exclusively and stop using the pee pads (or the carpet!) but he finally did it! He hasn't had any accidents in months. I get a new one every two weeks and it can get a bit stinky by day 12, but I put a couple pee pads under it to help soak up the urine which helps. I really only smell it about 2 days out of the month, which is impressive considering the size of my apartment.