It's great, the cat liked getting inside. I put the backpack on and it seemed comfortable to me. When the back opens, it has much more space than in the carrier you had before, which is great if we make longer trips in the car or something like that. In the side pockets, I can keep my wallet and its vacuum sign, but it would be perfect if they were a little bigger or if there was a pocket for a water bottle, that's what is missing. I love the detail that zippers have small plastic buckles to prevent pet from opening them. The base has some plastic pieces to protect the backpack from the ground. The biggest problem I'm causing is that when closing the large part, it has become a little complicated for me. I hope that with its use, it will be easier. It could also be that I didn't do it well or that I didn't have enough strength. In general, I recommend it, it seems of good quality. He arrived in Madrid within the deadline.