I can recommend Leader for everyone. I buyed "Complete Game Review" and Leader´s impact to my game was immidiate. He showed me leaks in my play, leaks thats cost me a money and stands between myself as a BE player and myself as a winning player.
Also Leader is funny guy with his glosses of situations on the table and have a lot of understating for my repetive mistakes
And a last thing - Im a long way from a native speaker, but every sentence I dont understand Leader repeat and repeat until I finally understand a point
So again I definitely recommended him!