A cool idea on using the space of the corner cabinet ! With these shelves, you can organize, see what's in it and not have to get down on your hands and knees if there was a lazy Susan in the space. Down side--- no hide and seek space.
If you have the drawer space, what a wonderful idea! Instead of stretching and climbing to see all your spices in the top cupboard or on the spice rack, keep them accessible and visible in a spice drawer.