Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not instant.

I bought this earlier this month and wanted to use it for baking one day but when I put it in the temperature changed VERY slowly. It took about 2 minutes before the temperature rose to around 145. I do understand that I may have received a defective product and I hope Amazon can address this issue but at least for my purchase it did not live up to what it advertised.