Sprite Candy as 3D Game GUI

Is Sprite Candy any good once combined with 3D?

I'll get the ball rolling by saying you should download the demo(s) of Sprite Candy and see if it meets your needs, because they're exactly what you're asking about - 2D graphics over a 3D scene.

http://www.x-pressive.com/SpriteCandy/
and head to the Downloads section.

Sprite Candy in fact actually uses 3D to do its 2D so there won`t be any problems.

Jason.