The view from the 39th floor west was, indeed, gorgeous. The location was quite ideal; although busy streets surround the building on all sides, it is easy walking distance to TWO train stations (one of which is den Haag Centraal, which I timed as a 10 minute walk, and the other being about a two minute walk), markets, liquor stores, a bakery, fast food, etc.
The only issues -- which don't significantly impact my ability to recommend the place -- are that the WiFi was somewhat spotty and, even when working, not particularly fast (which was a bit of a surprise). Also, on one of my three nights at the flat, there was a lot of noise in the flat (or business?) directly above me at around midnight -- about fifteen minutes of moving furniture which was quite noisy.
The one defect I brought to management's attention (a dead bulb over the main dining table) was addressed within a reasonable period of time.
I had fun at this flat, and would recommend it.