Well said, R.R. Rat.
For me, the "greatness" of this building lies in the enabling, life-giving qualities you point out and that I also anticipate it will bring to Sherbourne Common. I think peering over the park from the fourth-floor terrace will be an engaging, surprising view as the neighbourhood grows.
Aesthetically, I too like the elegant expression and twinkle-in-the-eye, sparkling, luminescent detailing. But I feel the main fun bit is the way it makes the functional explicit (hence my Beaubourg association) in a reserved, honest way, letting activity be the real star of the show. What's more, it's a nice, multi-volume riff on our neo-modernist tradition (cue the throwing of eggs). It doesn't need a Fordian supertall ferris wheel made of onion domes to make a strong statement (or Piano's RGB exposed utility piping, for that matter). It's more along the lines of how Peter Zumthor can make a tin shack look nice - just good craft.
