Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: worked well, until it broke

I've owned this air pump for about 4 months now and tonight it died. It started making a really loud rattle, so I unscrewed its case and found that a cheap piece of plastic was holding the vibration mechanism and this piece had broken and so the vibrator was rattling all over. Basically it's now trash. Pretty pathetic that this thing died so fast, it's clearly built cheaply inside. It's almost as if it's designed to fail. The broken part is very obviously in need of reinforcement.