Don't really like those, as the outside section is all plywood flooring.
Looks nice the day of construction, but after 2 straight years of dogs pissing on the plywood floor, it won't look so nice. Will never get the stanch of piss out either.
I much prefer 2x4 flooring, spaced an inch apart, for the outside flooring.
This allows for piss/shit to fall out, right after it comes out of the dogs, minimizing contact with the wood, rather than the pee/poop sitting there on plywood for hours (absorbing/ruining it) because it has nowhere to go.
Jack