The accessories that come with StarNavigator 102 NG are simply low-quality. Meade tried to lower the cost, but at this price range, anyone would expect better.
The eyepieces have 9mm and 26mm apertures. They are budget Kellner’s and provide below-average views. They will be adequate for the beginning but should be changed as soon as possible.
The red dot finder is not a bad choice. It is cheap and useful, and with a GoTo mount, you won’t need to use it that much.
The amici diagonal lowers the image quality quite a bit. It also should be changed, maybe with a star diagonal.
The focuser is a 1.25″ rack-and-pinion. It is almost completely plastic. This would be OK if it was able to handle heavy eyepieces, but it can’t.
Overall, there is not a single accessory that is worth praise.