I've been using it for a while and the performance on a Mac Pro with a 5 worksheets and 10 graphs is god awful.
It takes a few seconds for things to happen if I want to change a chart title or something.
Or rending graphs, it pauses, then does it.
This isn't difficult MS, why can't you test things properly!?
I don't see this kind of thing at all? Even with quite complex sheets?