Great route, a smaller road than one to Marbella, but still good fun with good scenery. From Coin east (to Malaga) it becomes a mass of industrial estates and roundabouts, so id avoid if possible. If you are in a rush to get between Ronda and Malaga (as i was rushing to the airport) its hard to say which is quicker, Ronda to Marbella then along coast to Malage or this road. This road i am sure is a shorter distance, but you wont maintain a very high average speed.
Lovely road and nice varied scenery as you get higher away from the coast. Tarmac is pretty good now all the way though I did it on a GS1200 so would have to be awful to be really noticed. Top section out of Ronda through the pass at sunset is stunning.
You'll be pleased to know, they've now re-surfaced the whole road!
Although agreeing with this report I would say that the part from Tolox to Ronda is quite rough especially if your bike has hard suspension. Double vision is not a problem over this part. The new section is supereb, just wish they would do the remainder.
The first stretch of this route (A366) is incredible. The road has just been resurfaced (April 2005) and it's corner after corner after corner until you get to Tolox. It evens out after that, but is still superb. In fact so much so, that I turned round and went back to El Burgo so that I could ride the El Burgo to Tolox section again.