Or is it primarily used as a screening tool? Last time I was in Chi I advertised there but didn't really notice much traffic. Thoughts?

I think it is the best site for ads. Eros has too many fake ads and no reviews, even more than Backpage(IMHO).

But, I've been considering trading it out for EROS since the clientele I got via rs2k was so much more quality.

I'm a member and do look there regularly

Very true !
At least on RS2K that doe's not ever seem to be a problem.

I am also a member and browse there.  
Knowing the process for myself, it was nice to know that they also verified the girl, whether they have an add posted or not.  

RS2k is widely respected, esp. in Chicago, and the guys rely on it to make sure the person is real, verified, and to look for specials.
I give a $100 discount to RS2k guys because it so aids my process of screening...I know if they are verified with RS2K I have nothing to worry about, and that if there have been issues, like no shows and last minute cancellations, I will know about them and be able to make my own choice as to whether to see him or not.  

We've obviously just had different experiences, then. When I had both ads running, my (authenticated) EROS ad brought more traffic to my site and more clients mentioned it when booking. I just didn't see the same results from RoomService.

I use RS2K and TER Ad Boards when reviewing who is visiting!

I am not a member but I still check the rs2k ads. It's not the only place I look, but it provides some assurance combined with other resources or ads. I think for a provider, there's some value in maintaining a consistent presence on multiple sites.

Since I recently joined RS2K, I look at the ads, but feel like there are a limited number of advertisers on the site so it's not my first choice in looking.

I didn't get shit from my Eros ad last time I was there, so that was $200 wasted anyway. $50 seems like a reasonable week's worth of advertising/screening on RS2K (not to mention the fact that their customer service is probably the best I've experienced), so I might as well.

$50 seems totally worth it for my week there. I appreciate the feedback!

I use RS2K a lot.  I'm verified and think it is the easiest verification for me.

Advertising there for almost two year now.  #1 best site for verification!  Wish every client I saw was RS2K verified.  Also never once had a safety issue with rs ppl and 90% are totally great clients too!  I do three month intervals so u save a little.

They have pretty good packages.  Plus, Kathy and Calli are really nice girls!

I have found it to be beneficial

I bought a years advertising  package last Spring,  as I was beginning to make frequent trips to Chicago.

Almost a necessity around here