What has been your experience with Honey Holes and Cat Holes

[gardenbean]

I've been told that they are a wonderful addition to the garden. They help enrich the garden soil without all the work involved.

Could someone explain to me (lay person terms please) how they can help with my plants if the holes are feet away?
And yes I do take some of my kitchen scraps and instead of placing it in my composter, I go around my garden a fill catholes. (No problems wiht any animals digging it up)