This was my first cruise with Holland America Line and must say a very disappointing experience in comparison to other companies.
Oosterdam ship is aging, and unfortunately this is not balanced with the service which I would quote as very poor for a cruise experience.
Thanksfully, you'll find some friendly staff onboard, but overall the level of service is poor. Staff reflect a low level of standards and worse tell you things but doesn't act as said! Curiously staff is using the same facilities than customers on their day off and you lost sense of who is the customer and who is the professional supposed to be in charge to make your cruise an enjoyable experience.