Some things about my stay which might be helpful to others:
1. The use of a working US mobile is essential to make contact with the host(s) .
2. The gates to the perimeter of the project apartments are sometimes out of order and you might need to shout to someone inside the grounds to let you in.
3. At five to midnight, desperate to get safely inside the complex, I used my UK mobile as an emergency (incurring roaming charges) to contact the host, but was unable to get through.
3. The building you're looking for is to the far left of the complex as you come into the gate in which you enter from the road.
4. Upon arrival, your passport/photo ID will be requested and photographed by the host.