Even though it is on the shorter side (around 3 hours for the two main rooms and I spent 7 hours in the game including all the lobby stuff, without any hints) it is well worth the money.
It is very well presented (graphics, design, narration) and the main attraction, the puzzles, are excellent.
The only limitation I would mention: This is not a game for someone new to puzzle games. You might be a bit lost and get frustrated. Or you use a lot of hints / look up solutions and this takes away the fun.