Johnny Dean's New Look!中 I don't think he's so great是怎么理解的,不太了解其中的意境.

Johnny Dean's New Look!中 I don't think he's so great是怎么理解的,不太了解其中的意境.
Do you remember Johnny Dean,the pop singer with funny glasses and long curly hair?Well,now he has a new look.He doesn't have long curly hair.He has short straight hair.And he doesn't wear glasses.But some people don't like his new look.''I don't think he's so grest,'' says Ruth from New York.''But my mom does
我也知道意思是：我不认为他这个形象很好。
但是so great 怎么说啊