It really does work well. You can sub any type of thing in an empty can, too. The wife likes orange juice. We've tried apple, orange, (both pretty good), Coke...the best is still beer. A half can of Bud Heavy with a tablespoon of crushed garlic in the can is about the best it can get.
And Budweiser, Coors, Miller Hi-Life seem to work the best for us. I don't often drink this kind of beer (prefer the Hefe's and Belgian style) but it seems to cook into the bird the best.

All this talk about it has decided me on what I'll be cooking for dinner (plus it's a good excuse to buy more beer!)