i have old cabinets and one cabinet is tall and narrow with no shelves. so it's basically wasted space.  I looked for narrow shelving units and couldn't find one until I found this one!  I did have to assemble the shelving unit inside of the cabinet (so that was a bit of a challenge), but after I did, it was perfect! the shelving unit is sturdy for my kitchen items. I wish there was an option to add more shelves though (or if a taller shelving unit was made with the same width)

Pros: easy to assemble, strong for lighter items
Cons: not tall enough, can't add additional shelves