While you will notice these shelves are not cheap (about $44) but they are SOLID. They will not get beat up on a trip with a lot of weight on a bouncy highway (canned goods, etc.). They are EXTREMELY easy to install as the package includes a layout pattern that lets you know exactly where to position the unit to install (all you have to be able to do is find the center of your cabinet). There is still a little space (maybe 4 or 5 inches) in the back of the cabinet as the drawer doesn't extend all the way back. This might be a good place for bigger/taller items. I plan on installing at least one more of these on the lower shelf where I can't see anything in the back without kneeling down.
Should work out well and the DW will definitely like it.