When I saw the mod for the first time there was something just a little off about the front end but I couldn't put my finger on it.
It turns out the front grille is wrong in a few distinct ways that just throws the car off - like a person who had a broken nose at some point and the nose remains slightly crooked but you cannot put your finger on it ;-)
- the vertical slats should be parallel (left and right side, all are exactly vertical, not angled to each other)
- the chromed trim should be equal width all around
- the shape of the two grills is unfortunately quite wrong (vertical trim in the center should be very parallel (left and right grill to each other) and the overall shape should be a little less parallelogram shaped but a little more "rounded corner rectangle shaped than it currently is)
The quite complex surrounding area around the grille is close enough and believable - just the grille just makes it look off (this is NOT an easy car to model, quite deceiving as it looks so very square and angular but has in fact so many intricate detailed curves and creases).
It is an amazing effort and I am looking forward to it being perfected just as the Primera has become a benchmark of its kind.
Here is a good sample to see the geometric differences of the grill: