the reviews ARE kind of confusing and misleading if you're not too familiar with the structure already, so don't feel stupid at all.
The show has a concert-like FEEL to it, but it's NOT a concert. It very much has a story line (no matter what people may believe) that tells John's story through his music, personal quotes, art and images from his life. 9 actors portray different characters, all occasionally taking on John's person and words, though there's central actors who play him most of the time (with Will Chase leading the entire pack.) In my opinion, it's done rather well, and while the creative directors of the show DO pick-and-choose what they show you, you get quite a bit of history on John Lennon the Man and a variety of his post-Beatles music.