Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great when it worked

Yeah, when it worked it was great, which was only for the first 8 months. Of course I didn't have an original receipt as it was a baby gift so Summer wouldn't replace it with the same color screen device. Instead I got a B&W screen device, refurbished, that was so blurry it made me more nervous looking at it because I could never make out what was my baby and what was her bed. Three months later the screen on this one stopped working.... ugh.