Yaheetech Small Animal Cage - Metal Pet Cage with Removable Tray, Ladder & Wheels for Ferrets, Chinchillas, Sugar Gliders - Durable White Indoor/Outdoor Habitat for Playtime & Travel

I have a small baby critter who will most likely never hit above 5oz in his adult life, and I don't like the idea of having him in a small hamster cage. My concerns are having a containment that doesn't exceed wire spacing of 1/2" vertical and horizontal. I was initially looking at the Critter Nation, but even with that unit, I will still need to use 1/2" square chicken type wire to line the cage. I also couldn't imagine where in the heck I could provide the space for a 36" wide across and 24-25" deep cage! I prefer having walkways in my home. I also had no need for a cage with doors on each side. I worry about the security and function if one door fails. I love the idea and appearance of a 3 tier cage. Although Widwest provides an easy option of purchasing add ons, a 3 tier Critter Nation would reach up to 88" in height! --I don't have an exclusive room for such arrangement. If I did have a permanent spare room, then maybe getting a pair of the Critter Nations would be an option. I want to be able to keep this cage in the kitchen area and be able to move it around if needed to other rooms. The Yaheetech is roughly half the weight of the other option, very well made and sturdy in design.I am very happy with my choice getting 2 Yaheetech Ferret cages! The shipping was super fast; 2 day FedEx on both. With shipping and tax, each unit was under $140; together only $278.80 and cheaper than one 2 tier Critter Nation.I found the instructions super easy. I just had to refer to the parts page, while following instruction. I used my own 5/32 allen wrench with hex key tip and set up was a breeze. For 3rd tier add-on, I used the 2nd floor setup (using the top piece with upper door and 2 hook loops for ramp hanging) twice. The Yaheetech is fully capable of this setup. The ramps are very easy to attach to the plastic level trays "if" you put your 5/32 allen wrench through the hooks under the tray and gently stretch the plastic...the ramps pop in securely and fairly easily.This made the perfect compromise for "grandma's needs" and "spoiling furry grandchild". His little mansion tower is 3 tiers, but only 74.5" tall, 31" wide and 20.25" deep. It's a very sturdy cage for our needs, and the wheels hold the unit's extra tier and roll very well. I must say it is a very nice looking cage! I love the design, the doors are very well made and work beautifully...it's going to be so much fun decorating inside with more things to spoil our little guy. For the bottom floors, we are using cardboard and rug style mats, so his little feet won't need to deal with wire bottoms. --Something I prefer over plastic liners anyway...we don't want him chewing any plastic.I found no flaws, no rust and no issues with these units. I also have the choice of creating a single rolling unit with bottom shelf (to gift/donate or use for another room or family home) or keep for spare parts.I highly recommend Yaheetech 2-story ferret cage and the option for getting 2, for creating a 3 story setup. (their one story rolling unit with shelf is smaller than this setup and won't work) 5 stars across the board! We are very happy =)