I didn't find much about teens on the Zaandam, so thought I would write my first review ever! We have sailed often, NCL, Disney, Carnival, Celebrity, and now HAL. I was concerned that HAL might not be teen-friendly, but booked this cruise as it fit with our dates and I liked the itinerary that included College Fjord and Glacier Bay.
Stateroom: We were in a stateroom on the first floor, far aft. Our stateroom attendant was amazing and always kept our room clean and neat. The bathroom was large enough for all three teens to cram in at one time if necessary. As others have mentioned, the windows need to be cleaned, but we were able to at least note where we were to determine if we should go upstairs for a better view! Others have mentioned smells on the lower decks. On one day, there was a terrible sewer smell midship, but it didn't reach our cabin. On the same day, our toilet stopped working, but a stop at the front desk had that fixed within the hour. There was amazing storage in the stateroom. We managed to put everything away in drawers or closets, with the suitcases under the bed. The two beds were very comfortable, the sofa bed not so comfortable. Overall, we were happy with the stateroom.
Ship: I thought the ship was in decent shape, though a bit tired. The promenade around deck 3 was a highlight. I spent many hours walking around and enjoying the beautiful scenery all around. The main thing that needs upgrading (as others have mentioned) is the terrible red carpet. It would be nice to have the windows cleaned as well.
1958, no significant problems. The window was dirty, you could see a bit through half of it, the other half too cloudy to really see anything. Very quiet location near the end of the hall. Almost no foot traffic. Felt some vibrations when docking, but nothing serious. Plenty of closest space for four. Main beds very comfortable, sofa bed not that great.