I bought this so my Nuna Pipa Carseat would adapt to my Mamas & Papas Armadillo stroller. The adaptors are easily attached to the stroller(just slide right in), and the carseat is just as easily placed onto the adapters. My carseat feels secure while strolling around. The only down fall is that when the adapters are attached to the stroller, you cannot fold the stroller. Which means every time I want to put the stroller into the car I need to remove the adapters THEN fold it. Not a deal breaker for us, just slightly inconvenient. The design flaw is really because of the stroller, not the adapters, but it's the reason I took away 1 star. Other than that, the adapters are great.