I still feel like viewing this building from the street - though limited views there may be - takes most advantage of the shimmering effect of the gem-like design of the facade. Viewing this from above at the Top of the Rock it reflects the streets and buildings below, and as a result, appears much darker. But viewing it from the street it will appear lighter - as it reflects the sky - and the facet effect will be that much more visible. The best views of this building will be from the 5th - 15th floors of nearby buildings that have a clear view of it, unfortunately.
Not that it doesn't look cool and unique and from the Top of the Rock, I just don't think that will be the best place to view it.
"Then each time Fleetwood would be not so much overcome by remorse as bedazzled at having been shown the secret backlands of wealth, and how sooner or later it depended on some act of murder, seldom limited to once."
Against the Day, Thomas Pynchon