This is a wonderful product!  I love the way the double doors open up the entire level for cleaning, arranging pet furniture (my rat loves empty boxes), removing the pet, etc. It is also escape proof; the floors (under the mats) are also 1/2 inch spacing just like the sides and top are.

I did need a hammer to tap some metal parts into alignment when assembling the cage, and found that the pictures in the directions didn't always reflect reality. (If you use common sense, though, assembly is easy--even for one person.)

I'm planning to use a ring of cardboard around the inside edge of each level to help keep the bedding in, and I've C-clamped the top on--just in case.

Little Bit loves running around in her new home--which is great because she was getting rather chubby in the smaller, boring cage.