Quoting I♥MyJackAttack:" What age did your child grow out of their seat? Height? Weight? My almost three year old is needing a ... [snip!] ... a new one so I was just curious! What seat did you get next? I need suggestions something around $100 because I'll need two."
My son carries a lot of his height in his legs so he outgrew his rear facing at 40.5 inches, 4 yrs 3 months. After that we bought Radians but I'm sure he'd still fit fine FFing in the My Ride.
This was my son right after his 4th birthday, and my daughter a little before 2.