As I said on the comments below my review on her, she is very busy at the moment, she is new and unexperienced, the maid is taking lots of advantage on punters, seeing her is a lottery!!
What the maid is actually doing is getting lots of bookings on the phone and then just picking the ones who are ready when she finishes with a customer, that was my case, I needed to wait for about 15-20 mins because she was "buying condoms in tesco", then when I finished I saw 2 guys on their phones just in front of the building, one of them surely didnt see her.
Hope she will be independant soon as she is a really good punt!