We have auto coure and it by no means moves like a snail. Obviously its not really fast as well.
U push pedal to the metal it changes gears late and the engine screams, giving a decent acceleration even with AC on but I personally dont like to practice this.
Without AC I have never encountered a problem with its acceleration.
Driving on CNG is a different story. Mine is petrol.
Its a small engine afterall.
Mileage I get with AC is around 13kmpl in city (keep in mind half of my journey involves travelling on Canal Road Lahore) but the other half has traffic jams so i guess it returns a decent figure.
AC performance is poor IMO. If its really hot and youre stuck in traffic, thats your nightmare.
The only car its better than is Mehran. So if your moving from a Mehran ull be satisfied. I moved from a 2003 cultus but my priority was Auto tranny because I was fed of changing gears in traffic and we use it as a fourth car although its driven daily with only one person onboard and almost will never take it out of city.
So it depends what do you want.