I don't know these providers, but a good rule of thumb is that if it looks and smells like b.s., no need to pick it up and touch it. It's probably exactly what you think it is.

I have not seen Tiffany, but I did spend time with Sierra.  We had a two hour session, and went for a drink.  We had such a good time talking to each other that an entire hour passed before I realized we better get upstairs.  She is absolutely delightful, smoking hot and makes you feel like the center of her universe.  I would see her without hesitation.  I tend to shy away from doubles because while I have had a few doubles sessions, there is just too much going on for my taste.  I like to focus entirely on the person I'm with.  Book her with confidence.  I can't wait to return to Vegas so I can see her again.