I've been driving it for around 2 days now and I think it's a pretty good vehicle all round.
Here are my observations.
1. Engine is a bit noisy but I love its roar anyway (not like the pussy cat cars of today which don't even meow). But it isn't as smooth as the Petrol Isuzu engine which is understandable. The power steering is definitely a convenience and makes it far easier to manoeuvre about.
2. The AC is definitely effective considering the powerful engine. I think the gas may have to be refilled in six to eight months though, since it doesn't get as cool as it could.
3. Suspension and shock absorbers are quite good in comparison with the earlier Petrol amby I had before.
4. There is visible amount of respect on the road for an Amby. For example in narrower roads, other small cars tend to swerve slightly and give room. Also two-wheelers and autorickshaws think twice before crossing my path and tend to wait till I pass, unlike smaller cars where they tend to brush close to you. That is not to say I drive aggressively, but I also find it easier in a way.
5. I'm a bit worried about the engine heating up at the moment. My father says it's common in a diesel engine, but the heat indicator goes slightly above halfway mark even for a medium-long drive. I've not taken it out of the city yet though, so I cannot judge entirely how hot it would get when it starts doing high revs at fifth gear for a longer time.