This actually happened to me the other day on one of our RAAS aircraft. Just as Tower was telling us something (we assumed was "cleared for takeoff") the stupid thing is saying "On Runway One Six Left." Gee thanks, is that what the big 16L painted on the runway means? We had to confirm our takeoff clearance after the thing finally shut up, all the while stepping on Tower trying to confirm that that we received the takeoff clearance. What a goat rope!

I can see it being useful in ORD on a 300RVR day though.