I have a two storey cage (slightly different to the one from Zooplus) I use mine as two seperate cages, I took the ramp out of mine and then where the hole is cut, put two pieces of correx that fit the whole base of the cage so the piggies can't move it. Mine's quite easy to clean, also has quite big doors so can easily get the piggies out. Mine's not the most sturdiest cage but does the job and saves quite a bit of room.