When I bought my water softener 8 years ago I knew that Culligan was one of the more expensive brands, but I had done a little research and it seemed like they had a good product.
I'm sorry to say that I've had more that my fair share of problems with them. My unit seems to break quite often, Culligan is the only company that can service it (no one else can get parts) their service calls are almost double ($135) the going rate - and they act as if their doing you a favor to come out. The last time I called for service it was 2 weeks before they could come & then they showed up 5 hours late.
I've scrapped my unit and moved on to another brand.