The key issue with the Nice-N is the diameter of the cockpit ball. It's slightly too small. The later TIE X-1 kit is (I believe) the correct diameter. Two shots below show the ball compared to the X-1, and one which probably makes it clearer is the difference in size between the cockpit window frames.
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The wingstars look good, but probably the biggest challenge is to get a realistic looking Koolshade effect. Given the wings are huge, this is the area where you need to put in a lot of effort with the kit. When I bought mine I opted for just the naked wing stars and managed to get some real Koolshade to get the authentic look. The engineering of the wings was complex, but well worth it. The Nice-N is a great model, and you'll be happy with the results. If you want studio accurate, then it will be a lot of work due to some core dimensions being off.
All that said, of my collection the TIE is my favourite one.
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