I finished FEAR extraction Point yesterday and then donwloaded and completed Minerva.
IMHO I enjoyed Minerva moreso than Extraction Point; not bad considering it was free.
BTW - was the AI pathing as bad in HL2 as it is in this expansion pack? A lot of times the guards would just blindly run up with guns blazing or just auto crouch/stand - the combat felt really lacking...
I think the AI was better in the original game.
In Minerva the combine guard AI was so brain dead (tended to be in interior levels) that they had a tendency to run at you guns blazing and then run past you and work its way through the level again only to run past you with guns blazing again and again.
Despite the AI issue it is definitely worth the download.