Sorry, Antonio: I have no experience on this subject. Even less since Renfe changed their Estrellas for 'Hotel Tren.' For the Estrella de Galicia, that was July, '99 - just before Santiago. I read a report in Voz de Galicia describing the Hotel Trains back then; they sound a lot nicer than the Estrellas; but I think there are still 4-beds in Preferente compartments and if you don't have a party of four or buy out the compartment, you are likely to find yourself sleeping with strangers.