Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Can be a better design

The oven looks very nice, and there is a separate warmer section which is very good. I can use it to warm up stuff while using the toaster oven to roast. But the inner height of oven is smaller due to design of the separate warmer section. For my old toaster oven(different band), I can easiy roast a chicken or pork shoulder, but when I use this oven, the chicken or the pork will touch the top of the oven and become burn. I am little bit disappointed about this. And suppose it is a convection oven, will cook faster. But I find it the opposite, it takes me longer to cook (I compare it with my old toaster oven which is a convention oven). And also for the boiler, it is not so powderful, it takes longer to get the food get brown. Tell you the truth I am thinking about return it to find out is there any problem with my oven or it is design like that.