I learnt at Algoa in Port Elizabeth and have only good things to say about the school and the place. PE's a great place, in between big city and sleepy town. I've heard good things about 43 Air School as well. And I believe Progress is fine but it's in the middle of nowhere and to be stuck out there for some time would be a problem for me.
The people at Algoa are marvellous and the instructors first class. I'm going back shortly. If you want more info feel free to email me.