I'm not a big fan of corroplast, plastic pet store cages, linoleum or any other smooth surfaces for floors unless they're covered with something else with more traction.Â
I've been seeing that rabbits not getting enough traction not only feel insecure and ill at ease, they can have physical problems.  Even wire floors are healthier for most rabbits.Â
I prefer wood, grass mats, vinyl mats, wire and/or carpet, preferably a combination of several of those surfaces.  Grass mats are probably the favorite, but they'd eat or pee on them (or both) so they don't last, and they can be hard to secure. I've had rabbits get sore hocks from just a carpeted surface. Â
Oddly enough, right now I'm using rocks, and they love them. A store close by was closing out and had these mesh and rubber mats with flat stones glued on to them. I've got them on my corroplast floors and my rabbits love them.
My pink-eyed white guy is always really reluctant to jump down onto the floor from his upper floors of his condo when the white corroplast is showing.  He did better with it covered by grass mats, but the rock mats have given him a whole new confidence.
Ditto with the 'bathroom buns'.Â
Mister and Darry live in a converted bathroom with a linoleum floor and plywood and carpet covering the tub. Mister in particular I think came from a single story small breeder cage and isn't a very good 'hopper.' He was constantly doing nose plants into the edge of the plastic hay tray when he went to jump in, and he was falling when he tried to jump onto the covered tub.  AND he was getting sore hocks.
I put two of the rock mats over the linoleum and a couple more over the carpet/wood on the tub and now he's happily launching himself all over the place.Â
And his sore hocks cleared right up!
sas :rabbithop