My biggest consideration would be how many days you will be at USO. If it is a short trip, then I would only use Express and save time. The only exception, for me, might be if there are big-time Harry Potter fans in the group. In that case, I would use Early Entry and go through the regular queues once and then use Express every time after that (Forbidden Journey, Gringott's, and Hogwarts Express (you would miss the walking through the wall effect - be sure to look for it ahead of you in line). I wouldn't bother going through the regular line for Flight of Hippogryph though. If you visit after the new HP ride opens, then that is anyone's guess about the regular vs. Express line, but I would assume the new ride will have an interesting queue (if there even is an Express option this year - there is no indication that there will be an Express line this year).