Not bad, there's basically two ways to do it. The first is to recline the back seat flat backwards and put the seat in from the rear cargo door. The second (which I do because I have a pet barrier in the back) is to pass the car seat between the two front seats and onto the bench seat. Interestingly enough there's more room between the front seats in their normal position than there is with the passenger seat folded forward, so that's pretty much the only way to do it. Once it's back there you slide the passenger seat forward and step in to buckle/latch it in place.