I used then a couple of winters ago. I liked that you can mix and match what you order, I have 10 ponies so I would order a mixed lot every two months. I think they use palletwise or something similar , so depending on the local driver they ring before, its all on a pallet. You have to order about 20 sacks before the delivery comes down to about £5. I used them for two winters and never had a problem and would use them again.