Review of Toasted Almond Flavor-TFA:

I've used this in a few recipes now.  Tastes more burnt at higher % (used it at 4% in a recipe and it was burnt tasting and bitter).  My best experience was using it in a castle long clone at 2% and it's amazing. 

The key word is TOASTED.  I think this can be a great addition to the right recipe at the right % but it won't be for everyone.  I've read reviews elsewhere saying this isn't a strong flavor and I couldn't disagree more.  I could see 1% or less even being enough for some recipes.