This is unquestionably the most well done such memorial that I have seen, other than The Wall in Washington, DC.
The visitors' center has some displays that are nothing less than awesome. It's clear that a great deal of thought and effort went into this.
The chapel is very nicely done. It's in the form of an indoor amphitheater, not very large. At the bottom of the seating area, what would be the 'stage' in an amphitheater designed for performances, is an area where visitors have left mementos, items of remembrance. That's an emotional hit, but the thing that hit home for me was not that ... but rather, the boxes of tissues placed on each of the seating levels.
This thing still isn't over.
But we knew that, didn't we.