I checked-in at about 4:30 pm. The clerk tried to asked me to upgrade to executive room for 87 euro night/extra. I politely turned her down. She check the screen, said "I see you are already a HHonor member", then after lots of key-punching, told me that I was upgraded to exectuive room. My experience is that when try to check-in at noon, many people haven't checked-out or the housekeeping haven't clear the room yet. With your diamond status, I would had ask later to see if upgrade become aviliable.
I paid 380 (126 * 3 or 180 * 2) Euro for my whole stay. I liked my room, but I was alone, and I think it would be too small for three people.
I throught executive lounge close at 8:00pm. I usually went back to hotel for shower and lounge before heading out to Leidsplein(sp??) anyway.
I actually went against the the traffic of the anti-war protest. I was finishing a morning visit at RijksMuseum. Walking toward the downtown direction and see police with anti-riot gears line up between the Museums, the entrance of Vondelpark, just south of the canal and Holland Casino. The whole thing was pretty peaceful and carnvial-like. I just took a few pictures and walk toward Centurm.
The whole trip is nice. It's one of my two trip on the infamous BA $20 fare. Knowing what I know now, I may had schedule the trip later in the year. But beside the cold weather, I enjoy this trip.