Both CityVibe and Eros have problems with fake agencies, bait & switch agencies, fake photos for girls - although both (I'm partial to Eros) are leaps and bounds better than CraigsList.  I would recommend you, as a newbie (I presume), pass up any ad for provider that has no reviews - at least until you know what to look for.  

A couple of Eros-specific things:

- Check the URL.  The page filename itself is usually constructed as

"city-usernameofadvertiser-providername"  

So, for example,

dc-marco9-penelope

would be a DC provider named Penelope that someone named marco9 is advertising.  In this case, marco9 is a DC agency that is pretty well-known.  Sometimes, even if the specific provider isn't reviewed, you can get an idea for the types of girls the agency hires based on reviews for other providers that work for them.

Then sometimes you may see:

dc-flo9-flo9

This usually (not always) indicates an independent.  A very general rule of thumb is that an independent advertising herself on Eros likely means the girl in the photo is the girl you will see when the door opens.  It does NOT say anything about how or if she will perform.

- Google the provider's phone number or e-mail address as listed in the Eros ad.  Chances are, if she's visiting your area, she's visited others.  Then post an information request on your regional board and the regional boards of other places she's been to see if anyone has seen her and did not post a review.  Don't forget to include the link in your 411 request.

Seeing a provider with no reviews is called TOFTT (taking one for the team).  Sometimes, it can be a good time and you can find a gem.  Sometimes, it becomes one of those reviews that you read sometimes that starts with: 'I should have known better, but...'

Good luck,

-PV