I bought this one so that I could fold and slip it into my diaper bag when Hazel started going to the restroom in public. We keep it in the guest bathroom right next to the front door and it can sit folded up on top of the toliet when not in use. Hazel likes to push down the suction cups and this flat style makes it possible for her to climb onto the toliet herself without my help, which is what she prefers. This is probably my top 2 favorite purchase out of the group!