I love riding with Willy and would do so any time he can be scheduled to come to near where I live. I've ridden training level through FEI horses with him. Be fit. He will work you and your horse hard. He is terrific with super hot young horses through GP. He's great with Jr/Yr's too. I'd let my 11 yr old daughter who rides 2nd level ride w/Willy. I've watched him be super patient with nervous AA's.
a fellow boarder at my barn was a working student under Willy for most of her high school career doing YR and he sounds like an awesome trainer (you can tell just by the way she rides). I'd jump at the chance to clinic with him!!