In reply to SteveM:
I've just come back from a 2 week there and have been once before. I agree with what has been said so far, Amptrax is brilliant (you don't need any trad gear like the Rockfax guide says its all fully bolted now), Rogellio is ok if you want an amazing view and the vultures flying about you, but the climbing is either really easy or just really loose and scruffy (especially the crux pitch). Rogellio top pitches won't be in the rockfax guide (in there its only noted as a top 50 '4') but just keep following the bolts.
You won't be able to get to Los Cotos because of the current gorge construction, but its polished to hell and isn't a great loss.
Turon is brilliant as people have noted, and the climbs in the bottom end of Frontales (notably Luna and Putifero (tough for grade)) and Escalera Arabe are great!
If you have a car and are willing to travel then my favourite crag of the trip was Loja, it was worth going for Patranas (6a+) alone, a top 50 if ever there was one.
Valle de Abdalajis has some good climbs but some are notoriously undergraded, you'll need to add one or two grades onto some of the more popular routes, notably the grade 4s and 5s in the Cantolandia area.
Hope that's a help
Matt