This is a game of exploration, with a great help system, hidden inside an NPC.
I loved the depth of this game, and enjoyed just reading through the notebook that my character has from her friend.
I was wishing for a little more out of the camera system, but I'll leave it at that--and I'll acknowledge that I may have found it too fussy if the game delivered what I expected from the camera system. Once you've solved the case, it is quite obvious what was happening. Still, with the wide array of choices, I think the ending could use some (very minor) tweaking to show a relationship between the photos you took and the outcome.
A for instance; I took photos of the sleeping chaperone, which I thought was pretty funny. It would have added something to it if my character got a detention or some other mild punishment as a result, despite solving the case, in the epilogue.
The puzzles are really well done, and if you are stuck, you can pay attention to other characters to get a clue. This game unfolds nicely and includes great red herrings.
The writing is top-notch. I'd highly recommend anything with Veeder or Boegheim as writers.