Instruct: Classify an Amazon review into positive or negative sentiment.
Query: It only failed me once...

And that was enough to return it to the retailer. All I had all week was false alarms, and when this units had it's first real and perfect opportunity to shine...it failed miserably. And I'm not about to have any money tied up in something I can't trust to do the job I bought it to do. On a long approach, on a fairly busy freeway, I drove right past photo radar, parked on the shoulder. I mean, I came within 10 ft of his car...and not a peep out of my Whistler 1650...nothing. Oh, but next grocery store I pass after exiting the freeway, then it starts going crazy! I saw the radar camera's flash in my rear view mirror, so I know it was on and actively monitoring drivers. If I wanted a grocery store detector, I could have brought my wife for free...