Does anyone have any experience of pooling family points on China Southern? Is it worth getting accounts for one trip per year to Europe?

quick review while I'm here - Just done a second round trip to Europe from NZ with family (in Y) on China Southern. I'd fly them again - great aircraft, on time, service OK. Hotel included in layover - an amazing service - not quite to the old Korean service levels, but great. Online engine and post booking is terrible if you are used to other major carriers..