Mechanically this car is quite reliable - I have not had any faults with it whatsoever. The only things that needed changing are brake discs and calipers, but that is expected.
However it is the interior trim that is really a let down. For example the plastic bit that protects the rear bumper from scratches when you take things in/out of the trunk is attached with some plastic clips, which broke very fast, so it stays on held down by only its own weight. Then the rubber bit that insulates the driver's door came loose (also attached by some flimsy plastic bits). The bits that cover the rails on which the front seats slide back and forth also came off, and it's not like I would fill the car with kids... And some other bits of the trim weren't properly attached and are loose.
So all these minor things make me question the overall build quality.
This was my first car, so it was quite important that it is easy to drive, and on this front it delivers quite well. Despite having only a 82 BHP engine, I think it sets off quite well, the steering is quite precise, the clutch is light, and the ride comfort for such a small car is fine.
One thing that surprised me is that the engine is a bit thirsty - I was not able to get more than 17 km/l in city driving and 20 km/l outside the city (on winter tires the mileage goes down to about 15 km/l).
Overall I think this is a fine small car, but due to all the minor interior flaws, I would certainly think long and hard before buying another Nissan.