by bigeeh
I taught 3 new players and it took us 5 hours from box open to finish. It was still a blast and time went by very quickly.As others have said, downtime between turns is the biggest drawback. Each player must puzzle out their turn and it's difficult to do so before your turn as things (board, available cards, available mana, etc) change constantly.
Although I would prefer fewer players and solo, I would still play a 4-player game because this game is so awesome.