Most of our bottom cabinets were really, really deep, which made getting things in and out pretty difficult. Also, the only shelf was a little 10" guy way in the back. Not the most practical, and didn't allow for great use of space. We'll call this the "before" picture.
The next shelf required Johnny to remove the center divider. He's going to attach it to one of the cabinet doors, so that one will close first and you'll never know the difference!
This one is probably my favorite, because it easily holds all of our pots, pans, and their lids. No stacking, or loud clanking around the find the one you need.
Rev-a-shelf makes a gazillion and one other organizing pieces for the kitchen and bathroom that I might want down the road. But for now, these two were the most important for our kitchen organization. It allows me to make the best use out of the two cabinets that receive the most use and need to fit a lot of items.
The units are really high quality metal, and the engineering of how they fit together and are supported in the cabinet is impressive. Little details like the dividers and ball bearing glides let you know these are quality pieces, worth the investment.
(Even though this is a product review and endorsement, it's based solely on my personal opinion and experience with the product, which I bought with my own money. Rev-a-Shelf or Lowes has no clue who I am, or that I bought their products.)