Well, I found Nissan to be well below Fiat in terms of CS. My Micra had a host of issues from knocking suspension, seat mechanisms constantly breaking, umpteen rattles and squeaks and recalls galore.
They wouldnt acknowledge the suspension clonks or the fact it bottomed out at the rear all the time, they told me the seats always break and what did I expect as they were now half Renault!!!! Customer service were totally useless, at least with Fiat they give some compensation. As for the rattles, they sent someone to ride in the car and he could hear more rattles than I could and said its because of the Renault influence!
But above it all, the Micra has no soul or character, its dull to drive and its rubbish too....
When I wanted to trade it in, one dealer didnt want it at all, the next knew of all the problems and offered a pittance and it was only Fiat that offered 6k after convincing the Nissan franchise they had to put it on their plot... the salesman at Nissan didnt want it as he was over supplied with the things.