If you are a purist or a historian, their are details that might annoy you because certain events have been altered for brevity (like how they met) or the timeline is not right (like how they came up with We Will Rock You, or when Freddy was diagnosed with AIDS). Even so, most of the events were factual even with creative license.
The actors were great, capturing the essence of the real people very well. And you really did understand that while Freddy was the front person, they really were a band, dependent on all members. Brian May might be the greatest guitarist of all time. Roger Taylor's voice was perfect for their harmonies and not everyone had that range. Also, John Deacon wrote a lot more songs than you might guess.
The songs, the story, the nostalgia. Definitely worth the price of admission.