Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does the job; worried about how long it will last

I bought this after reading the reviews mainly because of the relatively low price. I've used it for a couple of days and it seems to be working as advertised. I like how it has different timing settings, but don't know if that feature really makes a difference for the watch I'm using it for. The only reason I didn't give it 5 stars is that it seems to be kind of cheaply made; it's all plastic and I am concerned about how durable it is, not that I plan to beat it up or anything, but still. . .