I saw this show last night in Chicago with two teenage boys and my our response was overwhelmingly positive. I went in totally blind but my boys are very familiar with the Percy Jackson series as well as the movie and they loved this interpretation. I thought it was great as a standalone show without any background. The songs are catchy, although nothing revolutionary or groundbreaking. But I woke up this morning humming some of the lyrics which to me is always the sign of a good show.
The staging is very minimalistic but not simplistic. They do a lot of really creative and innovative things with very few props and set pieces. That said, I never felt like I was watching a high school version of the show - it definitely felt like a Broadway production. I don't want to spoil anything here, but the depiction of a farm tractor and a motorcycle are particularly noteworthy and we loved it.. The staging is very similar to Rent, with open scaffolding, spray painted backdrops, and a very small but visible band.
In my opinion, the show could definitely benefit from one additional male Ensemble member and one additional female Ensemble member. A few cast members perform numerous rules - literally too many for me to count - and by the second act I got a little weary of seeing the same faces coming out in different costumes. It was literally the case that an actor would walk off the stage and 30 seconds later appear from a nearby entry point in a totally different costume. That was distracting to me although my kids didn't seem to mind or maybe they didn't notice.
All that said, the performances were all fantastic. The actor playing Percy (Chris McCarrell) has a fantastic voice and stage presence, as do the other six characters. Jalynn Steele, In particular, has a beautiful voice which is particularly showcased when she is playing Percy's mom. After seeing the show last night, my sons woke up this morning talking about looking forward to seeing it again. It's only in Chicago through Sunday so I quickly purchased three more tickets for tonight's performance. If that's not a ringing endorsement, I don't know what it is. If you're considering seeing this show, do it. You won't be disappointed. (One final point, some action does occur in the wings of the stage (particularly stage left), so I would recommend against buying any obstructed-view seats.)