Hard to say
I myself am a femfeet fan bar none, however I have purchased several FM Concept videos. The only appeal they have for me is a surplus of beauties, rapid release rate and decent prices. They don't tickle the girls as well in my opinion, but there are some models that are very ticklish and burst when slightly touched.
Here are some vids I enjoyed FS-69, FS-61, FS-63, FC-113(because of Anita, an explosivly ticklish girl) and FC-129.
These are tapes I've enjoyed, but to each his own, I can't promise you will like them. If you have a DVD player I recommend you purchase the tickling DVD just for the novelty of it and it has some cool scenerios.
Go to FM's site and browse the monthly release sections where each tape has picks of the girls in ticklish situations.
Longbaugh.