Unliked The 7th Guest, I did not play The 11th Hour when it was initially released. There have been many remarkable improvements in this game such as much faster movement speed, easier access to help functions (no more backtracking to the library), and slightly better acting.
However, this game now berates you at every step. Stauff simply won't shut up, and the game makes it a point to let you know you're a complete idiot if you don't solve the puzzle in one move. Sometimes even taking the shortest route (four moves to complete the library's book puzzle, for instance) will result in Stauff saying you have the brains of bird droppings halfway through.
The pacing is also absolutely terrible, and the new riddle mechanic makes it that much worse. You're constantly clicking at random objects hoping to figure out the terrible clue you were given. How is a "riddle" of a heart attack putting you into the ground supposed to make you click on a globe? Or how about a clue about a winter coat supposed to make you find a bottle of tonic?
Adding to the frustration are game-breaking bugs such as solved puzzles not registering, audio glitches such as some ambient sounds playing at more than double the volume of the speech and music, and lack of context for pretty much all of the FMV sequences.
Overall, this game is far worse than its predecessor due to these problems and more. I do not recommend buying this even if the game was on sale for 90% off. You will get more enjoyment for your money from buying a soft drink than you would buying this game.