Had a test drive with Fabia Ambiente ...but not yet convinenced to buy

Hi, I had a test drive of Fabia Ambiente 1.2MPI. Over all I was impressed by the car. on the positive side the car has all the safety and luxurious features that anyone will like to have. Also checked the classic varient it is also good but the it is not having  dual tone interiors and does not give u the fresh and classy feeling. On the other side Ambiente is having dual tone interiors, air bags and alloy wheels. Very much liked the heavy strong built of the car this will definately keep it stuck to the road, the gears are ultra smooth like a joystick gives excellent feel and will make comfortable drive in traffic.

But still there are three ponits which is holding me to go for this car.

1. The AC does not give good cooling ...in the rear seat AC chilling is negligible, I have read the reviews and its said the it has rare cooling ducts ..but the showroom guys said that it is not a feature in Fabia.

2. The average claimed is only 10/11km/ltr. Technically it is not clear to me why a 1200 cc engine with 70 ps power should give such a poor average. ( and that too with a poor ac).

3. Cost of spares and avaliablity.

 Any Fabia owners/lovers please help me with your experiances on the above points which will help me to decide on this car.

luxurious interior, strong bulid,safety standardsnoise,below average ac, fuel efficiency