The road grip is pretty impressive though it hasnt been too spiritedly driven. Its an all-time 4wd and is very good uphill.
Now coming to the people who think that mira is underpowered, the KF-VE in it has 58hp which is pretty close to what most of the 1000cc cars here have and some have even less than that. Some time back, I too was under to impression that 660cc cars would be underpowered until I did some research on them and after getting one, it was confirmed that they are not underpowered at all. Some mira owners who think that their cars are underpowered, should get the maintenance work done as suggested by members earlier because even with the ac on, the engine is pretty responsive.
About the spares, the regular maintenance parts are not expensive at all but the body parts tend to be a little on the expensive side because a limited number of kabarias have them in stock so they exploit that fact.