It was a bit more than I expected as I had to lower the front of the (overhead) microwave in order to access the grill mounting screws on top the unit. However with a little bit of reading in the installation guide and, now this is important, a second person to help install, whet off without a hitch. Just as a side note about Appliance Parts Pro, I ordered the item and within two days was installing it; fits perfectly. Thank you for the speedy service and exacting part. I will definitively order from your store again.