I would also warn people that you can have problems with textures and materials. In particular, if a material used in the scene matches the name of a material in the project you are bringing it into, it will ignore the new material. When Xpression copies texture files, it puts them where it wants them instead of where you may have had them.
This is an issue for us when multiple people need to work on different scenes in the same project - not a great idea, but when we're down to the wire it's sometimes necessary to get things done.
#XPression