"true X expert"

Jeffrey is my X friend He's a pleasant and open person who always offers good advice. I haven't known Jeffrey for very long, but his advice has helped me many times. I consider him an expert on Twitter account development, and I follow his posts because I see value in them. I like his sincerity, he doesn't make up beautiful stories; he writes the truth about his profits and his losses, which is very important. He also has a great sense of humor, it's a pleasure to talk to him.