Instruct: Classify Amazon reviews into positive or negative sentiment
Query: terrible design

This is the worst bed rail. The design of having it sit on top of the mattress cuts into the sleeping area of the child hence allowing the child to hit his/her head on the (huge) plastic end. It is very hard to get into the "lock" position and sticks way out when folded down.Not worth the $30 charge - I returned it the day after I bought it