Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Safety problems

I had several safety problems with this car seat and have finally gotten another one. My son always slid out of shoulder straps when in the rear facing position. I constantly had to adjust the straps even though they claim that you would not have to. I finally gave up on the seat when the crotch strap stopped locking into position and my child could slide down in the seat any time. I called Evenflo and they replaced the seat with another one. I am going to return it and get a refund, Evenflo did not want to give me refund.