Received cage 1 day early. Nothing was loose or moving around in the package when I received it. It came in a relatively small package and once opened the cage inside had plastic zip ties holding several parts of the cage together and some thin bubble wrap separating some of the pieces. I had it together in about 15 minutes. There are NO assembly directions other than a piece of paper with some pictures of the cage on it. You will need a Phillips head screwdriver and an 8mm wrench. There are 2 sizes of screws (small and large). The smaller screws are for the cage. The larger screws are for the base. DO NOT tighten screws until all pieces are assembled. There are 2 bars that support the plastic drip tray. The bars attach to the base with 2 smaller screws. The casters were very easy to put on and the whole cage slides around on them like an egg on a well oiled pan. The cage had no bent bars, no missing bars,no loose bars and it fit together perfectly. No wobbles, no gaps. The only flaw I could see would be the 4 smaller feeder doors which did feel weak-I think anything bigger than a parakeet would be able to move them up and escape. I don't plan to use them so I will zip tie them shut. The main door is nice,sturdy and swings open all the way. The lock is a little strange-again, good for small birds but I think a parrot would be able to figure out how to open the door in a short time. I shopped my local pet stores for a large bird cage and saw some that were selling for $150-$200 and they looked and felt flimsier than this one and were in fact even smaller. This is a great cage. Great value for the money. You and your birds will be pleasantly surprised.