I have tried the Keto cereal too. However, I didn't used their milk with it.
Used an Atkins shake or mixed up a Carbolite (vanilla soy mix) Shake in place
of milk.

I, sort of liked it. Reminded me of Rice Crispys type cereal. ( no sweetener )

Now I am not bragging about it at all, just saying that to me, it wasn't bad, for what it is. ( Low carb )

Just my two cents worth.

Question: Was it the milk mix or the cereal that didn't taste good?
*Was thinking of getting the Keto milk mix at one time.

Cheers, John