A "prostitute reviewer" (as he calls himself) has done an AMA on Reddit:
np.reddit.com/r/IAmA/comments/99bb1c/iama_prostitute_reviewer_in_amsterdam_ama/?st=jl6pyn0a&sh=455e2ace
As you can see, it's horrendous.
I honestly cannot believe that we have these type of websites in the UK as well. Isn't buying sex technically illegal here?