Our recent Rhine cruise was not as good as last years Douro cruise. We travelled on Viking Sun where we felt attention in the restaurant was rather hit and miss; coffee at breakfast was often difficult to obtain, and as a white wine drinker I seemed to be overlooked for a refill while the majority who drank red got a plentiful supply. Once I could get hold of a waiter I was attended to. If I remember beer correctly least year there was a Sommelier in the dining room, and it was not left to the waiters. The Maitre Di occasionally walked around but did not seem proactive. Despite these grumbles we enjoyed the cruise and will probably return to Viking.