If you decide to buy - definitely take advantage of the "slower" market and the historically low interest rates.
Pleople find this extra space great as they can use it for extra storage or some people even have made the space into a place to work out or for an office. I sould suggest you find out the "scoop" on the current status of the building by contact ing the management company of the building and read the minutes for the last 6 to 12 months so that you get an overview of what is happening in the building.
I would also ask the management company about the plans to build on the east side of the building. Please keep in mind that I haven't shown in the building for approximately 9 months so I do not have the most current info on the building"s current status.