When I moved down to Cape Town I went on the N1. There were some roadworks after Bloom then, but that was like 3 months ago. Even so, it's not a bad road to use at all.
I see that report is dated March 2014 so should be latest, usually quite reliable as it also has contact details for route manager or the routine road maintenance manager for each section. Had a good look through and the details are accurate for the sections I know well. Should help.