How about a Cutslin buttershake as a breakfast substitute?

These days, with things like Bulletproof Coffee, consuming fat to generate energy is all the rage. I don't have time to prepare a proper breakfast, and going out on an empty stomach causes heartburn, so I'm looking for a convenient meal. That's when I came across Cutslin Buttershake; I became curious because it is said to have a buttery flavor and be very filling.

While I do have a diet goal, it is more important to me to stay energized and not feel hungry until lunchtime. For those of you who have tried Cutslin Buttershake, is it filling enough to get through your morning work without any issues just by drinking one? I am curious if it tastes greasy. I am a bit worried because it contains butter.

Also, please give me some tips on whether it is better to mix the Cutslin Buttershake with water, milk, or soy milk. If it is a good product to quickly gulp down and head out on a busy morning, I plan to order it right away.