just found out about this through great little trading company and wondered if anyone has one and do they really work.
i am a nervous wreck with ds2 managing to do this however tight i make the harness on the carseat. i did go to a baby shop a while ago to see if the did something to stop this happening and they said no because it could affect the baby's chest/ribcage if i had to do an emergency stop.
help please.........