Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bad Design!

After the batteries are installed, the battery door (which is on the front of the unit) does not close. It just flops open. The door catch is a horrible design. Even if you could get it to close, I wouldn't trust that the latch would be durable enough to handle multiple battery changes. I am returning both of the units I ordered. Not Amazon's fault, but First Alert's.