Instruct: Classify the given Amazon review as either positive or negative.
Query: Basically very happy

I purchased this Oster Toaster Oven recently and am very happy with it except for one thing. The fan which goes on during Convection Baking starts out quiet, but becomes quite noisy during the cycle. Since this fan cannot be shut off, this can become quite annoying. I had a Hamilton Beach toaster oven, which worked well. Its convection feature could be turned on/off. I don't know why Oster chose to make this a feature which cannot be shut off. To me, it was an unwise decision. I know that other reviewers have mentioned that their fan is also very noisy while others indicated that theirs is completely silent at all times. I should contact Oster and find out if this is a malfunction.