HKS Air Fuel Regulator

[StockSolara]

I was looking at the HKS website and found the HKS AFR. . . I looked at some of their dealers and it is being sold at about $110. . . I was wondering is there a reason why most people went with the A'pexi S-AFC. . . Is their something that would not make the HKS AFR work with our cars?. . . here is a link to it http://hksusa.com/categories/?id=1920

[Turbosolara]

If i remeber right this has fewer adjustment point. people like to go onto safc just because it has cool displays and has a little more adjustment point. I think if your car is not hardcorely mod, it's ok to go on with this unit