I drink Celsius. Not every day, but here and there. Also coffee.

So, a real answer instead of "it doesn't"

- It doesn't taste like coffee. Relatively flavorful, but obviously a bit on the artificial side

- I drink a Celsius when I am targeting minimal stomach disruption (e.g. before a run or before intensive cardio)

- I drink a Celsius when I don't want to wait for the coffee-maker during early morning hours.

- I drink Celsius if I run out of creamer (for coffee), something I don't need anyways but I like.

- Cold brew is acceptable substitute if I don't have a Celsius.

- Normal brewed coffee otherwise.