Like any other program there is a required amount of learning to gain true access to the selected program. Carrara also has a learning curve attached which in my mind is not that steep. I use carrara as the main rendering and scene construction program and import poser content in a carrara scene.

The other beauty I find with carrara is that if you wish to edit the imported content then you can via carrara's modelling room and texture room and then your completed piece as a carrara object ready for use in any other scene that you create in the future. Also you can create new items for your scene in the modeling room and as a result your limits dissapear completely.

But this is just my pennies worth and others may have different thoughts.