We stayed at this Marriott for five nights at the end of June (Sunday evening to Friday am). We were upgraded to a corner room facing the Leidseplein, which was big enough for two adults and two kids.

At check-in we were given a sheet outlining the lounge hours:

Daily: 6 am to midnight
Breakfast: Mon to Fri 6 am to 10 am
Cocktail hours: Sun to Thurs
Hors d'oeuvres: 5:30 to 7:30 pm
Dessert: 7:30 to 9:30 pm

You could go in and grab a drink any time it was open. Staff were very nice.

It was not one of the better international lounges we have been in. It is not that large, and was absolutely heaving with people in the morning for breakfast. No tables available for over 15 minutes. One day we asked for, and were given, coupons for breakfast in the restaurant downstairs. Breakfast food in the lounge was okay.

There were two hot dishes during the evening, but they were awful all week. I could have shot 150 yards with the rock hard meatballs (served two days in a row). Another two nights we were served breakfast wraps. As in leftover breakfast potatoes and sausages wrapped up in a pita......

We liked the location, and the room, but the lounge was just so-so.

Since the lounge was advertised as closed on weekends, we moved to a Cat 2 Courtyard in Brussels for 10,000 points including free parking.

Enjoy Amsterdam.