Quoted from PBFan:I agree with the OPs assessments. IM is a great game all around but I think the ball times are too long and (for me) I suspect it will make the game feel like a grind in the long run.
Iron Man ball times are too long? You must be the best player ever!
If you like difficulty go with Houdini. IMDN looks great but it does look like it might (might) get tiresome with longish ball times. I'm like you, I prefer shorter games.