Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It doesn't do what it claims

I bought this product because I want an oven can cook frozen meat or fix something quick. I saw it on TV, it got my attention. So I came to amazon.com and checked its reviews, it has very good reviews. I decided to buy one. The first day I tried to cook 1.85 pounds beef roast, it didn't cook. I stricktly followed instructions, When I finsihed cooking , outsize of the roast looks pretty nice, however, inside was still fozen. I didn't have a chocie, I had to cut them to small picese and recook, it became hard rocks. Then second time I tried to use it to cook defrosted beef (0.8 pound), it didn't turn out as I expected. I wanted it well done, after follow insturction suggested time and power, it still raw, I have to add cooking minutes. Then I got it over cooked. Anyway, a big dissapoinment! If you want to cook forzen meat, this is not a good oven. If you fixing something quick, it is better to use stove top!