Instruct: Classify the given Amazon review into its appropriate rating category
Query: I'm disappointed in the product

I'm disappointed in the product. I went with the glass, I thought it'd be easier to clean and handle. First, if you don't fill the water all the way to the water line, it will just boil, unless you flip the on/off switch off. Second, the lid doesn't pop off, I worry that I might pull it off completely when I scrub. Third, the biggest disappointment is that it rusted at the bottom. Thank goodness for the glass! I noticed it through the glass and then while scrubbing it was rust. The worse part - I purchased two of them. One for myself and one as a gift. I'd give it less stars if I could.