>>I am pretty sure that Icase is faster, but whether the difference is significant or not, I don't know. But the improved readability can be translated into improved maintainability, and that's enough for me. I have been able to tidy up some rally messy code.
>
>I agree. I'm in the camp that like to maintain clean code.

Here's an example of ICase() translated into nested iif()s, while trying to keep the readability

#IF hV9
	lnA=ICASE(lnB=0,0,	;
		lnB=1,1,	;
		INLIST(lnB,2,3,5),3,	;
		INLIST(lnB,6,7),4,	;
		lnB=4,7,	;
		0)
#ELSE
	lnA=IIF(lnB=0,0,	;
		IIF(lnB=1,1,	;
		IIF(INLIST(lnB,2,3,5),3,	;
		IIF(INLIST(lnB,6,7),4,	;
		IIF(lnB=4,7,	;
		0)))))
#ENDIF

The conversion from the above to the below turned out to be just inserting iif( in front of every expression, then closing parentheses in the end. This way they look just equally readable to me... though Icase() is nicer.