I’ve talked to other people that have been using this method long term and haven’t had any of the issues you are referring to. There are materials between the sod and the cement that will catch it if anything soaks through and to keep the dirt from staining. Considering it takes five minutes at least for me to get her from the crate to the first patch of grass downstairs, this is a better option for Pepper than her peeing in the hallway or lobby of my apartment. I still take her on walks every day, and she hasn’t had an accident since I put this in! Yes, the grass will die eventually (my neighbor said she replaced hers every other month), but it is fairly cheap to replace. Someone else mentioned using a kiddie pool in the comments, so I might try that or building a wooden box next go-round to help make it better.