Our over-the-range microwave was so trashed from the drywall guy deciding to use it as an exhaust fan that the filters were completely trashed. The lights were also burnt out so I replaced those at the same time. All the filters were very easy to replace, as were the lights. The two smaller filters just slide right in. The carbon filter requires removal of the front grill, but that just involves removing a few screws and carefully pulling it off. The lights are easy as well, just remove one screw, maneuver the glass cover off and replace the bulbs.