Loved them!
For a while there I thought I just sucked at hidden object games because I had no strategy and would just panic and could never find anything. I was determined to get better at these games so I downloaded a ton of demos including all the MCF games and using some of the tips others have talked about (looking for 3 things at the same time, reading the objects out loud and repeating), I discovered I was pretty good at them!
So I went ahead and bought all the MCF games and played them one at a time and just finished Madame Fate tonight. Everyone was right that each MCF game is better than the last and Madame Fate was outstanding! Loved the mini-games and loved the cliffhanger.
I quite enjoyed the shift of ambience from game to game. They just got more mysterious and creepy and the mini-games/puzzles more ingenious and tougher (in a good way).
So two thumbs up for the MCF games and kudos to BFG for a great series! Eagerly awaiting the next MCF game (and Azada).