If you're looking for a safe location in Cairo NOT NOT CHOOSE MAADI! Please don't let the estate agent tell you how safe it is near the embassies (we all know what happens to Embassies)
One friend of mine has been attacked by taxi drivers, kids and teenagers 5 or 6 times in the space of about 2 months. I witnessed 4 separate incidents in the space of 30 minutes in Degla and I've lost count of how many of my friends have had their bags or money stolen/pick pocketed.
Maadi is NOT safe! Think about other options!