This bag fit my nuna mixx stroller perfectly and I was so happy that I had wheels so i didn't have to carry it, plus my newborn, plus the carseat while boarding the airplane by myself. Although, there is no handle and the wheels don't extend much off the base like traditional luggage, so the wheels just help you drag it across the floor.
I was super pleased with this bag and how it held the stroller, but after just the first flight it ripped! So now there is a giant hole in the item that I used only one time. I would think an item made for travel would be a little more durable. The other issue was, I had a hell of a time trying to figure out how to roll it up the way it came to me. I was awkwardly wrestling it near gate check with nearly every person getting off the plane, stopping to help if I need help because I was seriously struggling. I eventually just folded it and threw it in the stroller since I couldn't figure out how to properly break it down.