It'll do in a pinch ... fresh will always be my preference, but it's nice sprinkled over a tea or to give that "essence" in a dish. I would think it'd be great in a dry rub, like a homemade lemon pepper. Not sure you'd get enough flavor to do an orange beef type dish if you were craving Chinese. :)
A few coworkers like it in their water for a change and to keep them out of the vending machines. I have tried orange, lemon and lime. I believe I got free samples from another site. I would buy it again if it were priced right.