I only buy one thing from Seven Springs - Iron Sulfate Powder 20% - 50 lb Bag. It serves to reduce moss and increase the health of my lawn. Delivery is always fast and S&H costs are reasonable, allowing the overall price to be competitive with local companies. I once encountered a problem with the condition of the product, as it was left in the rain upon delivery to my house, rendering it useless. My call to Seven Springs was met with concern for my difficulty as well as an immediate response to remedy the situation without additional cost to me. As such, I would rate their customer service as excellent.