OK, the poll on infant carseats has me worried. I have one from a friend (Fisher Price) who only used it once (in her mother's car when they went to visit), so I never saw any height/weight limits. How do you know when your infant is too big? My dd is 11.5 months and still in hers.
I read on another thread here that you should keep them rear facing even into toddlerhood cause it's safer. There was a link to a video comparison of front facing vs rear facing crash test dummy. What kind of seat can you use for rear facing with a toddler?