I will probably use ironman mode once I can play this game and not have to do a reload when things happen that are BS. Granted, the fact that you can force-exit the application and go back does alleviate that issue, as it does for pretty much every ironman game mode ever, depending on how aggressive they are with autosaves.
I do like the thought that every choice is final, I think it will make things like kingdom decisions a little more interesting because you can't just try it, reload if it didn't work. Courting will definitely become more of a chore though.
One thing that worries me about the mode is how long it takes for children to come of age, if your character dies in battle from a stray arrow and the game just suddenly ends because your spawn is only 3 years old, it would be pretty anti-climactic. Maybe I'll do one with death disabled.