It depends on personal taste. Some people might enjoy it if it has an interesting plot, well - developed characters, and stays true to the essence of the Twilight universe. If it offers a unique take on the story or characters, it could be really good.
To determine if it's good, you could look at the reviews or ratings if available on the platform where it's hosted. If other readers have given it high marks and positive feedback, it's likely to be of good quality. Also, if it has elements that you typically like in Twilight fanfictions, such as a particular relationship focus or a certain writing style, it might be great for you.