I have been using these guys for over 5 years and they are brilliant!! I buy Sentinal spectrum from them and they are one of the cheapest around. I have 2 dogs, so buy 2 lots at the same time to save on postage. They always have arrived with in 3-4 days, and if you are not happy with putting your details over the internet, you can fax or even send a cheque by post. I have had excellent service and the best price and have recommended them to loads of my friends who have all had positive experiences from them.