I've dealt with a variety of SWGs over the years, and I have never been a fan of the Pentair Intelichlor systems. To me they seem over complicated, and in my experience have a lot of problems because of it. They also put the brain of the system into the cell, so when a cell goes bad, it costs twice as much to replace.
So I'm curious to hear other opinions. There must be a reason why some people seem to prefer them.