I placed one for the first time about a month ago for a stay I have in Gloucester next week for a 2 hour GFE for £200. I got probably 10 replies in a week or so, ranging from a couple of suspected scams, a couple way outside my price, a couple of nutters and a few apparently genuine. I think you need to be suspicious of the replies and check as best you can. I was also looking through possibilities in the area, not many suitable, but got an RB reply from an SP on that list as well and made arrangements. A review to follow in due course.