Hello - Thank you for choosing GE Appliances. We apologize for the inconvenience caused by the 900 Wattage microwave not being powerful enough to cook your dinners. We understand your disappointment. Adjusting the cooking time according to the wattage mentioned in the manufacturer's guidelines is important to ensure optimal results. Please refer to the owner's manual at https://images.thdstatic.com/catalog/pdfImages/e2/e2e5914e-3d88-4344-bdbe-d4014106c7e0.pdf to explore the cooking features of this microwave for the best use. We hope this helps! We're always here if you need anything. Take care, Shayla@GEA