My son started out in a dept. store Schwinn-branded child carrier, but has since graduated to a Trail-a-Bike (Original Compact model) with optional backrest. Had I known at the time that I was going to buy the TAB I would have invested in the Adams Baby Seat that integrates with it.

In my research I was also very impressed with both the aforementioned iBert and Topeak seats, as well as the Kettler Flipper.