@john
From what I've read - I think those GE/Sears (etc) units are all based on the rotary control valve design by NorthStar. Perhaps not the most reliable, but very cheap to repair if it comes to that.
New units do away with manual setup, set your hardness, number of people and it goes from there. Some will even do a "smart regeneration" based on historical water usage and that sort of thing.
From what I've read - I think those GE/Sears (etc) units are all based on the rotary control valve design by NorthStar. Perhaps not the most reliable, but very cheap to repair if it comes to that.
New units do away with manual setup, set your hardness, number of people and it goes from there. Some will even do a "smart regeneration" based on historical water usage and that sort of thing.