Very nice and easy-reading review!
What about game-length? 2 hours? regardless of how many people playing? (1 to 5?)
And what about the number of players? is it ok with 2? alone? with 5?
It all depends on the players, I have had a 5 player game last 1 hour, and 3 player game 3 hours. Like any game it depends on who is playing. I didn't like it solo as a lot of the rules are changed and it is a bit boring. Best with 4 or 5.