I went out on the fire-escape with tripod and did some long exposures (this is 30 seconds) tonight. It’s a much better view than what I see looking directly out the window (back of a school).
There is a history of photographers doing shots out the window that goes back a long ways and you can even find entire books (Ruth Orkin) shot out the window.
*** One note about the ee-D grid screen for the Canon 5D: almost impossible to see at night. This was taken at night with as I say long exposure – and there was no way I could see the grid lines which would have been helpful since I was using the 20mm f2.8.