Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great oven until it fails

I bought my first Panasonic microwave oven in the late 1970s. That oven was a workhorse in my kitchen for 21 years. Since then, I have gone through 3 Panasonic microwave ovens. The NN-T654, bought in 2001, caught fire and Panasonic quickly replaced it and took away the remains. The NN-H965F put out an acrid smoke after 14 months of service and Panasonic sold me a replacement for the shipping charges. The latest unit, another NN-H965, will only indicate a "H98" failure code on the front panel after 24 months. Panasonic has offered to sell me another "discounted" unit, citing a price that is $10 above what anyone will pay right here on Amazon.com. Oh, and by the way, the guy that had problems with Wifi in his house...my oven knocks me off of the internet as well. I was willing to endorse Panasonic as they took action when their products failed...but now that they interpret the warranty literally...I'm done.