Instruct: Classify a given review into positive or negative sentiment.
Query: poor quality...2 units have failed!

we're on our second one of these, thinking that the first one was just defective. basically, the white noise sounds just stop working...like they're shorting out or something. the second one is doing the same thing, of course this doesn't start until it's too late to send the thing back. i would not recommend this or buy another one.