I've reviewed this one before
External Link/Members Only she's not bad and seems to be independent. Someone else just reviewed that Thai Lydia one. But apart from those two I think all the adverts are just Chinese girls who change each week or two. They're usually not very good, dodgy setups in residential streets and well... I hope you like hairy armpits.
That said my best ever punt was with one of the random Chinese adverts and a girl calling herself YoYo. Visited her quite a few times before she disappeared. Fuyumi on EI was also great.