I to have had trouble with mr Watman. Delivery was short by 18 bags and it took a lot of phone calls to get the rest delivered.
I think I have also had problems with contamination, my whole bed of multi sown onions turned brown at the tips and refused to grow. This was my first year of no dig gardening and I had to rely heavily on commercial manure, hopefully my homemade compost will be enough for next year.