Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works good at first, just wait 6 months.

I got this for a Christmas gift last year and it worked great out of the box. Other than batteries dying quick it worked fine. Then after 6 months the inside temperature would go crazy, jumping to over 100 degrees. Shortly after that, the outside sensor stopped working and the unit would display just two dash lines. Very disappointed would never get this model again and highly recommend to look for different model.