Hi,
I would like to share my experience with Abu Bakr on this forum.
I believe that not only is he an expert in all things air conditioning in cars, he is very honest, humble and his prices are unbelievable. For what most garages charge for gas only, he serviced each of my car (I have had three cars serviced, two Citys and one Mehran) and have absolutely nothing but praise.
Additionally, this is about the only 3rd party AC garage I know of where the system is vacuumed (all air is removed) before gas is filled.
For a perspective, a complete service of my City (including cleaning of coil, changing of clutch washer, complete service of condenser and of course new gas) cost me around 4k.