In reply to Tom Last:
Rolo singles it out for special praise in his guidebook.
I know 4 or 5 people who have done it, they always smile when you ask about the route, so I guess its very good.
I have not been to Patagonia ( but the El Chalten guide is my toilet reading atm).
Comparing it to Chamonix routes, I would guess its like climbing O Sole Mio on the Cap, Le Ticket and Super Dupont all in one day. Without bolts and maybe just a bit easier than the tough bits of Super Dupont.