I stayed here during a conference at the RAI Amsterdam Convention Centre, and it was perfect! It's 5 mins from RAI or the South/ Zuid station, via the subway one block away, and very close to the airport as well. In addition, you can get to the center/De Wallen in a few minutes on the subway, and the museums and vondelpark are a short walk away.
The space itself was just as advertised, and was an incredible deal vs the conference hotel, a few blocks south. I would definitely stay again!