I had a wonderful canceled flight experience (oxymoron? lol

) on UA also.
My flight from EWR to DEN was delayed because the plane (777) was popping circuit breakers in the galley. The gate agents were totally honest in telling us all of what was going wrong. The flight was canceled shortly after.
Took care of my dinner in EWR, and got me on a later flight to DEN.
The only complaint I had was that I had to fly on an A319, not the 777 I was susposed to.

I love that 777
Keep rising, United.