iv'e had two different Rotastak cages (dreamland and pink palace)
they are brilliant but there a pain to put together
they are more suited for Syrians though
Syrians can climb the vertical tubes no bother but dwarfs find it hard
i kept a dwarf in the dreamland cage for a while but i had to build it in a different way.
my dwarf found it very hard to run in the wheel but when i loosened the bolt thing it was able to run in it.
my Syrian can run in the wheel without having to loosen the bolt thing.
i think Rotastak cages are fantastic and i would recomend them to anyone buying a new cage.