When I bought this adaptor I thought it would fit my car seat really well since it was made for a chicco car seat. It does not, but you can make it work. I went over and over the directions and did exactly what it said. I finally was able to get it to "click" in but the car seat is still a little wiggly. I checked online and many other parents are having the same problem. Reading other parents comments online helped more than the directions it came with. It may be user error but it should not be that hard for parents to figure out. Overall, if you really want to use a chicco car seat with a city stroller this will make it possible. I do like that it can fold with the adaptor still attached to my city micro.