I recently used this product with my 2-year-old (23 lbs) in a Britax Marathon and a 22″ carry-on roller. Overall, I am very happy with the strap. There are some minor details you need to know, here are the summary:

PRO:
- Your little one(s) will love it, it’s a novelty stroller for them
- Strap is simple and easy to use, it leveages(extends) the car seat’s belt system (top and two sides) to attach to your carry-on roller.Travel Tips
- It works well but make sure to do a test drive at home.
- You will get postive comments from almost everyone you pass by. If you have extra straps with you, you can probably sell them on the spot. Amazon should be paying me for the upcoming business they will get from my word-of-mouth advertisment!

CON: (not really cons but just observations)
- Expectation on size. Not really a con but just a little let-down when you get your package. Has nothing to do with usability.
- Price but still affordable. Probably cost $.50 to make so hats off for the inventor that came up with the idea
- Roller fitting. Make sure to try it with your roller. Three points on this: 1) make sure to pack your roller full, otherwise it’s difficult to “grab” the car seat; 2) make sure your roller’s handle is not a single arm , you will need an opening to thread through the top belt; 3) make sure your roller handle is long enough so you don’t have to bend down too much to pull or push the car seat/roller when attached

Again, overall a fantastic product. I took a star off for the price. Otherwise it’s a great purchase.

More information at Traveling Toddler Car Seat Travel Accessory