This is the king of rat cages. We have one and our rats LOVE it. There are several full floors, several balconies and several doors. Each level and balcony has a ramp. Our rats are all young so we don't have all of the ramps in. They like to climb straight up the walls. We got ours powder-coated. I highly recommend this option for ease of cleaning. I also recommend using pull ties rather than the meatal clips to hook the upper and lower levels together. Then it is very easy to take apart for cleaning. You will need to do this because it is HUGE. When introducing rats, just close off the upper from the lower level by raising the ramp and securing it with pull ties. Open it again to let them interact. Worked great for our introductions.

Pros: great fun for the rats

Cons: a bit hard to clean

I purchased this cage having heard awesome reviews about it from other rat lovers. Within on year, the powdercoating was coming off, and the galvinized metal was not only rusting, but absorbing the smell of rat urine, no matter what I cleaned with. Trying to get this beast of a cage in the tube to scrub it down was a nightmare, and you have to be a contortionist to reach some of the corners.
The space is nice, but other than that, I would never buy another one of these cages. I bought a Ferret Nation to replace it, and I much prefer it!

Pros: The rats enjoy climbing on the sides

Cons: It's difficult to clean, and rusts easily.

The ruud is a mansion for a rat! It has many levels and ramps for rats to climb and is very spacious. Our rats love it and climb the walls as well as the ramps. If you have a lot of rats, this is definatelly the best option.

Pros: Rats love it

Cons: Hard to set up

This is a great cage for anyone with a lot of rats. It has tons of space for multipule rats to run around in. It is rather hard to assemble, but once you're done, it's a great cage.

Pros: rats love to run around in the very large cage

Cons: is rather hard to put together