I've tried IE on three occasions - each time I had meets with genuine women, and two of them became short-term fuck-buddies. BUT... I would not have paid for any of the women I met in an escort environment, nor would they have drawn much interest if I saw them out in town. The appeal was that they wanted no-strings sex and didn't waste time getting down to it. Both times we had sex on the second meet. The other three times I had a coffee with a woman there was little or no interest on my part, but they seemed up for it.
Overall, I am in two minds. Yes, it is possible to get sex, and I didn't find it too difficult, but unless you get a medium- or long-term relationship out of it, you're still paying parlour rates for each shag! The appeal comes from the thrill of the chase and the fact that the woman is genuinely up for it, and you may get lucky and find someone you really fancy. Be prepared for rejection as well, however, they aren't all after you, and when I pop back to the site to have a look every now and then, a LOT of the same names from two years ago are still knocking around.