I visited this part of Cairo during my time in the US Army. It was 1998 and my fourth deployment to the Middle East. Cairo was almost overwhelming in its variety of impressions, sights, and just the sheer number of people. New Mexico, where I live, has roughly 10 people per square mile, or some other ridiculously low number. Cairo has about 170,000 (based on the figures I read). WHAT A DIFFERENCE!
Having said that, the historic section of Cairo is just beautiful, even though it is showing the wear and tear of the ages. Minarets, markets, mosques, tilework, colors, smells, people...I still get dizzy thinking about it.
I only wish I had done more research prior to my visit. It sometimes becomes a little difficult to determine the age of a building...which might cause you to miss something truly remarkable.
I can only say "GO!" if the opportunity comes your way.