Had this oven for two weeks and the enamel has already chipped from moving the glide rack (and I followed directions). The directions say to use graphite on it, but I assumed it wasn't required immediately or they would have done it at the factory.  Also, the microwave is dark as a cave. The light is so dim I can't see the food most of the time. A candle would be brighter.  Also, this unit is wider than previous units and just barely squeezed in between the neighboring cabinet doors. The installers said 4 out of 6 units they delivered in the past week didn't fit at all.  Unfortunately,  this is the only 27" black stainless unit available in the past two years. If you can find other options, I suggest you take them.