We've had our XR640 about 1.5 years. It looks cool, and worked fairly well for a while (bit slow to toast).Recently we noticed the back, bottom heating element begin to curve downward. In fact, it looks like the element has stretched with age and now curves in a gentle S-curve. The front element is bowed up. I was going to try and order the elements and replace them, then the toast dial quit working. I've used $30 B&D; toaster ovens that were better quality. I expected more ...