If the game allows you to save at any point during the missions, then why not just enable frequent auto-saves to avoid the player having to always remember to save. I think the game should be more about the game play and not about save/loading save files.
I really cringe when I have to re-do entire levels and to be honest I doubt I'll play the game again because of that.
For such a well known gaming company, I would think they would have come up with a solid auto-save feature by now. Maybe their developers need to go back for refresher classes to optimize their skills.
I'm just glad I didn't have to pay for this game to find out the auto-save feature svcks!
Anyhow that's the end of my rant.