Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Thermostat Doesn't Work as Described

I bought this for my cat so I could turn off my mattress pad during the day or leave it on while I was out of town. The description said it had 2 thermostats and that the max temperature was 102 deg F. My cat laid on the bed (pad was placed under a quilt). After 30 minutes I found him near the window on his perch. I checked the temperature with a thermometer and found it exceeded 115 deg F; just like my regular heat pads turned on low setting. As their description says - temperatures exceeding 102 deg is unhealthy (though my cat likes it around 105). I returned it and purchased the Zilla reptile thermostat (Zilla 11939 Temperature Controller). I put this under a manual control heating pad and the thermostat turns the pad on and off as needed to keep the temp around 105 deg F. The set up worked perfectly for the 10-days I was out of town.