>I'm sure that this has already been covered.
>
>Any real benefits to use iif instead of if...else...endif?

IIF() is a function and IF is a statement. They are not always interchangeable. I would use IIF() when condition is simple and easily can be replaced with IIF(). It's more readable for me. For example

IF a=b
  c=3
ELSE
  c=4
ENDIF

* Replacement
c = IIF(a=b, 3, 4)

Also following IF I've seen many times can be simplified w/o using IIF()

IF a=b
  llSomething = .T.
ELSE
  llSomething = .F.
ENDIF

* Replacement
llSomething = (a=b)