We waited to cut into it until the last movie. Even one thin slice was overkill at that point and I don't think any of us finished our pieces. And since the cake was so big I still have about half of it sitting in our kitchen waiting for someone to come along and devour it. I'm very proud of the way it turned out and hope that if anyone wants to show off at their next movie marathon they will consider doing the same.
Cheers!