We have the Pria for DS and he has been in it since 6.5 months. I love it but when the reviews say it's hard to install, listen to them! OMG it is so hard to get it in snug. Other than that, I don't have any complaints. I wish I had gotten it from the beginning so I could use the TinyFit system. It has super thick padding so I feel like DS is more comfortable when we make longer car rides.