Poorly :,( In preparation I spent a lot of time reading company history and mission statements, watching Developer Conference videos as well as focusing on obscure C++ details (which I have been tripped up in in interviews before) and not nearly enough time on problem solving/algorithm development. I was also unable to sleep the night before no doubt due to jetlag, excitement and nerves. While I didn't feel at all tired on the day (if anything I was overly excited) I certainly didn't perform nearly as well as I'd hoped and was not surprised when I didn't receive an offer.