I LoVE these seats for my Bugaboo donkey stroller. They are so easy to adjust to your child (even one handed!) Which is so nice as I have 2 under 2 so I'm usually strapping them in at the same time! The sun shade goes down to cover nearly their entire body which is perfect in the summer or when they fall asleep. I bought the "mono" when I just had one baby and when my second was born just attached his carseat. I recently bought this extension set because he's too big for the infant carseat and he loves this! He's only 5 months so I recline it a little. It's the best stroller I've ever owned- highly recommend !