I haven't seen her but I would like to relay my experience with "her" here...
Saw the ad you posted, only with a different number, in the Kitchener section of bp. Tried to set up an appointment, but schedules did not mesh. Later in the week I saw her London posting and noticed it was with a different phone number. "No problem" I think, girls often have different numbers for different cities. Later in the week I texted her 'kitchener number' and her 'london number' to see if she was planning to come back to KW any time soon. I got a text back from her london number first stating that she wasn't going to be around, and then less than 30 seconds later I got a text from her kitchener number stating she would be around that afternoon.
When I tried to explain my confusion she texted to tell me that her "friend" was actually going to be using her phone in kitchener... not sure what the actual story was, but I decided to avoid this one as it just seemed shady. Would like to hear back from anyone who has actually seen her though.