Espoma Soil Perfector is great stuff. It accomplishes what the manufacturer says it is supposed to do: enrich the soil while deterring voles. We'll use it as long as we can get it.
Great product. Comes in handy around the yard for top layer and bottom layer of potted plants. Helps with drainage as well as keeping birds and pests away from plantings. Ordered a 30lb bag on line and it was shipped to my house Very Satisfied!