One thing is disappointing - the game takes a long time.
While it's the opponent's turn, I listen to audiobooks, sometimes watch TV, and just browse the internet. When I played against Leshy, I even had time to go and eat:smile26:
The most difficult opponent, if playing against the AI, is Haven.
If playing against a human, it's against a strong player :)
And my favorite opponent is the one who can teach me something :)