After reading other reviews about sturdiness I used zip ties to reinforce as I assembled.  This helped me feel more secure about it but as long as everything lines up correctly the clips on the cage do hold tight.  Making sure that everything is lining up as you go is key.

We did have a cat escape the first night - so you do want to double check that the doors latch securely - it is easy to have just the top of the door catch and the bottom not, and just looking at it- it looks like it is secured (till the kitty starts pushing against the bottom corner of the door!)

The double swing open doors make this easy to access for cleaning, feeding and interacting with the cats - much nicer than other brands that have a smaller pull down door.

The only real improvement I could see is making the bottom tray slide easier - the opening is just a bit too snug to pull it out easily.