GREAT high quality cage. Assembly was less than an hour. The screwdriver it comes with does more damage than it's worth. Use your own. Two clips which hold the top on stripped out immediately, I drilled a hole and ran a bolt through. I have three rats and this house is more than a mansion for them.  I looked for days for a decent cage but all of them seemed cheap and flimsy. This was the only one which seemed like it would last for many years. This was the only cage with full access from the doors being the entire front of the cage. Makes cleaning a breeze.  It it's heavy, but the casters make it easy to roll around. Money well spent.