How do you compare dimension level name to specific value?

Best way to compare if specific dimension is at certain level is by using 'IS' operator:
Example:
WITH MEMBER [Measures].[TimeName] AS
IIF([Date].[Calendar].Level IS [Date].[Calendar].[Calendar Quarter],'Qtr','Not Qtr')
SELECT [Measures].[TimeName] ON 0
FROM [Sales Summary]
WHERE ([Date].[Calendar].[Calendar Quarter].&[2004]&[3])