I have a 12 lb cat that loves this stroller. It has tons of room for her to fully stretch out. There's plenty of room for one or two more cats. I like that there's netting on the back of the carrier so she can look at me or look forward. It's easy to put together, push, turn, lock the brakes, fold, and get the carrier part on and off. So simple. I got the 4 wheeled one and I highly recommend,