Fresh Patch has been a godsend with my brand new golden pup. I live in an urban, central area where I don't feel super comfortable taking her outside yet, and I live on the third floor. She took to it pretty quickly and it has saved us from having to go out every hour up and down stairs. She exclusively uses this unless we're visiting a friend's house or out elsewhere, and I think 2 weeks would be the absolute maximum you'd want to stretch it. When my new one came this week, I was a little horrified at how the old one looked in comparison and I may switch to a weekly delivery. The large is perfect for new puppies, I'll probably upgrade to the XL even before she's at 30 lbs just for some extra room.