I've been a treker for many years. For me, to see different people playing my favorite characters, it was hard to imagine. However, my biggest problem with this movie since I heard it was coming out, was not seeing strange faces on the screen. Instead, it was the possibility of getting something wrong. For example knowing what Romulans looked like before "Balance of Terror". I thought the young actors who reprised the roles of Kirk, Spock, McCoy, Scotty, Uhura, Chekov, and Sulu were superb! Particularly the young man who played McCoy. He nailed the part! If you're planning to go, and have qualms about this movie, remember; it's NOT classic Star Trek, but it's quite good if you remember that it's an alternate time line!