The car seat attachments fit the Nuna Pipa, but they are a bit difficult to use. I have no issue seating the Nuna Pipa onto the car seat attachments; however, it is difficult to get the car seat off of the attachments. I have to use my foot and press down on the stroller for leverage to lift up one side at a time.
Easy to install on the stroller. Easy to attach car seat onto attachments.