I was skeptical at first, because the original Star Trek isnt Star Trek with the original cast. But hey, its Star Trek and any true fan will at least give it a chance. What I found was that the movie was so well scripted, the paradoxes and changes that we Star Trek veterans have come to know as fact was covered in such a way that it didnt go against anything we grew up learning as the Star Trek universe and the suprise appearance ties up all the loose ends of the changes that were made to our once stable universe.