I have never had the guts to use Eve/Chance, but she has been reviewed on this bored a few times.
The deal is you are supposed to arrange sessions with her husband, and at some point, there was mention of proof of being clean needed. Having said that she certainly gives the impression of being ready to go at the drop of a hat, or pants in her case.
Apparently she is a nice person and really into it, but the whole safety thing scares me. That being said though, I wonder if there is really any difference between BBFS and BBBJ, the later of which most seem to be willing to have done. Maybe, give her/her husband a call and ask?
Let us know what you come up with because I have seen a few questions like yours on the board.