Testimonies abound...but good doctrine is the bedrock of true christianity.
No doubt someone could go into some whacked out snake-handling church service in Haiti and say they saw the love of God, Son and Holy Spirit. But does that church teach bibical truth? Likely not.
I'm not saying that Mount St. Mary's does not teach good doctrine because I don't know the place, but I would never know that it does from this person's description (but I do have to say that the shrine to Mary depicted in a picture on this thread does strike me the wrong way).
May the Father, the Son, and the Holy Spirit elevated and exalted and magnified in every single thing that you do and say.
Your reaction to the Marian shrine is visceral. Distaste is sometimes based on conviction, sometimes on prejudice, always on personal history. Not useful to bring this up in response to this article.