They are not obligated to give you more than a HJ, so if you walk into a session obviously feeling entitled to extras that can definitely work against you. Any mention of expecting what others have received is the kiss of death.
Don't discuss anyone else, and definitely don't mention review boards, which most girls hate with a passion for very good reasons.
Being clean, friendly and kind can make things go much better than aggressively trying to push for what you want, especially your first time in. Yes you can politely mention extras, but just going with the flow and letting them do the session their way can also yield great results.
Even though we are paying, if they also like you and feel relaxed and comfortable with you then your sessions will likely go a lot better.