O is so darn heavy! we have the keyfit 30. I'm trying to hold out until spring to change her over to the "big girl seat" - also kind of sad to put away the bucket seat, because she's getting too big too fast! sigh.

when did you transition?

ETA - right now, she's over 16 lbs at 4 months. so we have a way to go to fit in the infant seat, she's just heavy! we received it from a friend after her daughter outgrew it, so we only bought the convertible