I was here in August, transiting from Amsterdam to another European city. I chose this one because it's a Marriott. I found there were pros and cons, and most of the cons were my fault, ultimately, which is where I had trouble rating the hotel accurately.
The wifi - that's just ridiculous in this day and age. I hate overt money-grabs. I just used the free wifi in the lobby. Most restaurants and bars will let you log in, anyway.
The check-in. OK. Not their problem that I arrived at 5a after a flight from hell and super-exhausted but I did call in advance telling them that I have a life-threatening illness and would need a room ASAP, and the girl assured me I could get one as soon as one was available and that it wasn't necessary for me to book the previous evening's room as there'd be checkouts happening through the morning. I thanked her, got her name (same as my niece, so I remembered it). I asked for her two mornings later when I arrived and the girl said, there's no-one by that name at the front desk.
Anyway, to make a long story short, after 4 hours of sitting with my bags in their lobby and watching streams of people checking out starting around 7a, it was 10a before they started to release the rooms.
As I say, mainly my issue, not theirs. I was using points and trying to save money so didn't book the 2 nights. And the next morning, I saw poor suckers in my place, so felt at least that they were consistent with their policy. And, the European thing does tend to be, not-round-the-clock service. Sooo...
The concierge was a font of info and easy to deal with.
The location is great for the Leidesplein - right across the bridge.
Overall, it was a big hotel and during my trip overseas this time around I actually was happier at smaller hotels.
Some tips: one night I took the wrong turn out of the hotel and wandered in the directions away from the Leidesplein - and ended up in a quasi business / residential / non-touristy and not-particularly-lovely part of town and decided to just eat dinner there - a place called Screaming Beans - and wow, was the food ever good - very artsy - no clue what I was eating but it was superb. Real Dutch fusion type cuisine and North Sea this and that that I'd never heard of. Would highly recommend. Jazz band was setting up to play just as I was leaving - other patrons seemed to be locals.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.