The upper and lower dishracks needed to be replaced because of the corrosion/rusting in certain areas - we'd been delaying replacement because the racks are expensive (~$250 total). Replacing the lower dishrack was a breeze - the upper dishrack was a little trickier because the instructional video was not the exact same part so I had to figure out some areas by myself. Of course, I spent some time cleaning the parts prior to reattaching them to the racks for good measure. Overall, the process took me 2 hours, but I'm thorough, methodical and clean up after I'm done. Also, I'd planned for my husband to do this task, but I decided to be super-housewife and am very proud of my accomplishment. :-D