Great building in great location, and a nicely laid out unit. During our stay, we experienced a bit of a fruit fly problem, though, and the air conditioner was not very effective -- so I'd think twice about staying here during a hot Chicago summer. But the building staff was very accommodating and the facilities (gym, lobby) were comfortable.
I will say, I have misgivings about Zencity's blanket policy of discouraging families with children to stay in their units. Every posting indicates under house rules that their homes are "not suitable for children and infants". This was not our experience (we managed to bring our one-year-old after some frustrating back and forth with the company). I'd encourage Zencity to rethink this... it's a blatant example of discrimination based on family status and I find it very troubling.