I replaced the gaskets on both of the top doors, and replaced the mullion piece on the left door. I watched the video provided on this website, which was minimally helpful because my replacement part was not similar to one used for the video. Luckily my part was actually easier to replace than the one used for the video. No instructions were included with my order, so I searched for other videos online. All was fairly easy. Took about an hour to replace the two door gaskets and the mullion piece but would have been quicker if we knew what tools we needed before hand. Everything looks great now, but I feel the seal on the doors should be tighter.