Kore designed our system and put everything in place, and we have had them winterized once. We got unnecessary bills because one of our main sprinkler heads kept breaking, but they denied that it was their fault - ie it was too close to the sidewalk or people were careless. They took no ownership. We have paid them a great deal of money but they are terrible at responding to calls and we are always left with a bill even when nothing is done/no parts are fixed.