think highly of (someone or something)
To have a very good opinion about someone; to hold someone or something in very high regard or esteem. I can tell your last boss thinks very highly of you, judging from the reference letter she wrote for you. Somehow I doubt the mayor will think too highly of an article exposing all of his financial details.
think ˈhighly of somebody/something
have a very high opinion of somebody/something: Her teachers think highly of her.His paintings are highly thought of by the critics.