In reply to BoulderyDave:
I think the ability to do 40m raps should suffice on most of the routes... ask around in the campsite/refugio as the popular routes are climbed daily. I can't remember there being any really long raps (unless we joined them together), but seeing as we had a 50m half/60m single combo I wouldn't have noticed too much!
Fantastic area. Print out tops ahead of time from pataclimb.com or buy the guide in town/in the refugio - I'd definitely recommend printing out the photo topos too though as some of the line drawings are super confusing. Photos aren't in the guidebook.
Fantastic area, would go back in a heartbeat. Let me know if you want route recommendations (on the easier end of things)