Review of Greek Yogurt Flavor-TFA:

I prefer yogurt over the other dairy options.  Not especially sweet or sour. Not as strong as creams, custards, and cheesecakes, but a nice, smooth dairy flavor.  It has, for the lack of a better term, a slight toasty flavor that is very pleasant.  You can actually taste it as if it were a food.  I mix at higher rates 8 - 12% because it is not particulary strong so you have to give it a little boost.  Aging does increase its punch. Very good base flavor you can mix with many other flavors.