Actually - it was better than I expected Norries - then again now that I can use my 512MB card with the game (which for the first five months would not work... bah) I think made a big diffrence (I wouldn't wanna try it with my older card I had to use for so long....)
The only tricky part was the rendering "after" I'd take a shot - the game would lag during that time (CPU load Way Up) so I kind of had to be sure to end the scene in a safe place
During the shooting / recording itself though - it wasn't an issue.