Wie geil ist das denn?!
Ooops; sorry - I mean "WOW!!".
(How a about a trip into german slang?
"Wie geil ist das denn?!" is a extraordinary tribute. "Geil" means, translated 1 to 1, "horny", but in german we use the word also to convey an enthusiastic feeling without any lecherous background.)
Norbert