Which Universal Orlando park are you visiting? Universal Orlando is the name of the resort area, like Walt Disney World is the name of the entire resort. WDW has 4 separate theme parks. Universal Orlando has 2 separate theme parks.
As for the worth of a Universal Express Plus pass, it depends on how much you think it is worth. Are you going to be arriving at opening at the parks? If so, you may not need the Express passes because you can do the majority of the park in the morning. Much like the Disney parks, the Universal parks become busy during the afternoon, around noon to 5 pm. If you are arriving in the afternoon or will be doing the majority of the rides in the afternoon, you might want to purchase the Express passes.
What time of year will you be visiting? If you are visiting during a slow period like the middle of September, Express passes are not needed because the wait times are very low. If you are visiting during a busy period like Christmas week, Express passes may be a worthwhile investment.
Many people think if you don't use Express passes, you will be standing in long lines forever. That is not necessarily so. Like Disney, if you arrive early and stay late, you can experience the majority of the attractions with a minimal wait. Some people here have techniques for you to avoid long lines, even during the busiest periods.