They have the worst business practice I have ever seen. They have almost nothing in stock, it all has to be sent from overseas somewhere.I can't order directly from them but have to purchase thru a third party sales outlet?? Who know NOTHING about the products, and talked me into buying the WRONG and more expensive probe. Its been almost two months and I still don't have the correct probes for my system, and the return policy for some of their sales outlets is 96 hours. If I could I would return all $1500 worth of there items, but am stuck with it. DO NOT BUY HANNA INST. products. read full review »