The looks thing is a matter of taste, nobody will appeal 100% to everyone. Yes, there may be WGs who are 'prettier', but she has the sultry, dark vixen thing going on to a tee. She has a sexual magnetism that goes beyond just her looks though... I get a boner just driving past the place where I've done in-calls with her.
She is very, very, very good at her job. You come out of the session feeling amazing and that it was an unrepeatably good experience, then you read other peoples' reviews and realise that you're not such a special and unique snowflake after all.
She's also one of the few WGs who seems to 'get' one of the fundamentals of any business - repeat customers are what it's all about. From what I can tell, she's calibrated service, advertising and pricing structure to attract the sort of customers she wants and keep them coming back. It amazes me how many women fail at that.