I don't have any experience with the safc. I'm assuming it very much like it only map ecu has a lot more tuning points. It just replaces your AFM, and you have to enter in all of the Hz values that the stock AFM used to supply the stock ECU. ECU makes fuel adjustment according to what Hz you enter in a particular field. You can richen or lean out areas that need adjusting. It's a little on the tedious side, but once you get the hang of it it's pretty simple. You have to tune the map ecu to satisfy the stock TCCS's fuel trim (Vf). Outside the parameters of the Vf trim and the TCCS will reject your tune and try to run its own map. I'll show you how it works one day.
The hardest part of tuning this thing is getting a rock solid idle. But it still works pretty good.