My friend own city diesel 1.5 sv model. Ive driven it for over 5000kms and in my opinion city is a comfortable car to be in and driving this car is extremely simple and easy. Not to mention milage is very good, He used to get about 20 kmpl on city. The car is a pleasure to look at too. I wouldnt call city diesel a fun to drive car because the acceleration is very sloppy that you will easily get bored as it is a pain to overtake cars on highways.This is my personal opinion. For most people this isnt a letdown and this cars has more pros than cons. This is not true for petrol version of city.
If you need a trustable car which does not loot your pocket I would suggest you to buy honda city blindfolded.