I have tried many of those "cheeses" and most are gross. They don't melt right, or at all and have some an icky plastic aftertaste. It is kind of a let down. Have you tried goat cheese? I noticed I could eat small portions of goat cheese. It isn't too bad, I actually really like it now, but it does have an interesting aftertaste to get used to...and it melts more than the fake cheeses. Like the site says that Crabby posted, the real hard, aged cheeses have been pretty good on my tummy too, like the aged, crystallized parmesean and gouda. Gouda cheese on pizza is yum.