Fast and free shipping was great. Arrived in good shape. Directions for set-up were easy to follow. There were just a couple of small minor bends in the bars but really not even worth mentioning. It was not severe enough to allow an escape. No extra tools required except to remove shipping materials. We are using cage for our 3 young rats. A very small young rat might be able to squeeze through bars but once they are a little older it is a spacious and secure cage. We did line the wire cage bottoms to make walking easier for the rats. It seemed a little cumbersome for them to walk on the wire floors.