I bought this bag to protect my stroller while flying. It fits the stroller, belly bar and cup holder perfectly. The padding on the back is nice. I just wish it had two straps like a backpack versus the one. My stroller was gate checked and had no damage at all thanks to the bag.

When making the purchase of the stroller, the bag was included.
Very good quality fabrics, super spacious (stroller, rain cover, car seat adapters, cup holder, everything in the bag). It has a special padding in the back area to protect the back.
It has a single strap to put it across the chest. That would be the only cons, would put two straps to use it as a backpack because the stroller is a little heavy to carry with one shoulder.