puntific,
well the price IMO is right , however Iv'e heard mixed reviews about FFE.Maybe do a search on them in the boards.
Personally I would try to get one from a local store so you can see the clam in person before you purchase. And make sure your tank satisfies all the requirements for a T.Maxima (lighting ,calcium,tank maturity and stability)
once again - buy it in person if you can , when a clam dies it can seriously FOUL (take my word for it) a tank so you want to make sure it's healthy
-steve