Parents who've had to put up with difficult car seats with safety belts are getting a break.
Starting Sunday, all new vehicles and child safety seats must have attachments designed to make them fit together like a key in a lock.
But experts point out the new law can't prevent all child seat mistakes -- and people still need to research which seat is best.
Reaction to the system has been largely positive among manufacturers, safety advocates and parents.
But some safety groups complain that the new latch anchors can be hard to find in the upholstery and may not be sufficient for kids heavier than 50 pounds.