The Pelican system is consistently highest rated for quality. That is what brought us to purchase the whole house system. Installed now two weeks, we can already see the impact on appliances and tile and granite surfaces with diminished scaling. Our rating would be five stars had we not experienced a leaky by-pass valve and had to go a week with the system only partially operational. We were pleased that technical services responded without hesitation in sending replacement parts, although sales did not respond. We will have a more complete review once the system has had time to fully operate.