Really frees up the space in my cabinets.  You may be thinking, "I don't get it.  This still takes up space in the cabinet, so how is it freeing up space?"  That used to be my logic, but here's the magic part: if you stand your cutting boards (yes I have several), pans, or whatever on the side of the cabinet wall, it greatly narrows the space that an otherwise larger kitchen appliance could have fit (like a juicer, pressure cooker, stand mixer, etc.).  If you lay your boards/pans down flat, you are taking up vertical space AND horizontal space.  Now I can put all my flat items in without disturbing the rest of the space for my small kitchen appliances that I don't like all over the counter.  I have a water purifier, coffee maker and can opener on my counter and everything else get's tucked away so my counters look neat.