I have loved the bassinet attachment for our City Select stroller. It was fairly simple to put together (the snaps were a bit tricky, but it made me confident they weren’t going anywhere!) and was quick to assemble and then remove when our baby grew out of it. The top cover makes it super warm. My daughter was born in February and we went on walks during some colder weather and it was always nice and warm inside the bassinet! It also made it super easy for her to nap while swaddled or if she was awake and wanted to stretch. Would highly recommend!