I've seen the renderings for it and it's a nice enough looking project. Mostly white with black accents. The material looks to be EIFS, a departure from the recent trend of glass and spandrel, and not a lot of window on the building. The windows are thin vertical windows spaced a fair bit apart...... The exact material is hard to tell from the DP as it lists the materials as white cladding, black cladding, white EIFS, black EIFS. The bulk of the outside falls under the white and black cladding (whatever material that may be)
The design reminds me of the Jumeirah Hotel in Frankfurt..not the massing but the way the windows are.
I think Calgary's newest buildings are pretty solid. N3, Verve, Park Point, The Royal, and this one are ones that would fit in, or be very good in most cities. Citizen Tower may seem kind of bland at first glance, but I think it's quite stylish.