Exceptional. I bought a lot of flavorings. These are by far the best. Will not be looking elsewhere. The size is a little bit bigger than I'm accustomed to buying. I wish there was a smaller size especially with this flavor because I like to add a lot of additional flavors to a main one but I don't need a huge bottle. For this one, I have had great success with a custard as well as ice cream as two additional flavorings with just small portions of each and it has come out by far better than any I bought over the counter. Other than that, this is now my go-to for flavors because they are extremely authentic and they don't burn out coils like others well just the same, I am a shake and vape guy and it works flawlessly. Couldn't be happier.