Stressful in the best way, forcing the player to make quick decisions and maths whilst never providing a chance to relax. There's a really nice, natural pacing to it, where just by the way the game is designed the player has more difficult economic decisions to make early on, but more time to make them due to the limited resources, then as the player's resources increase and the economy opens up the player still can't sit back due to the sheer number of fields they have to manage.