Just a quick update - I drove to Swaziland last week for a bit on R&R at a nature reserve. The route we drove took us through Machadodorp to Barberton and I have to say I encountered probably the best road I've ever driven!
Twisty with a few long stretches, beautiful views - flawless tarmac. It really was a pleasure. We were in my wife's car, but the drive was stunning nonetheless. I'm really considering taking a drive out that way sometime in my car - just to drive the road