I totally rely on p411 when I set up a date.
I have about 30 favorites on my p411 account and I'll usually schedule one of them.
If I'm looking for a new provider on p411 I just browse through their profiles and when I see a provider that has the look, rates & availability - along with listed TER reviews - I'm interested in I'll look at her reviews on TER. (If she doesn't have TER reviews I move on) If things look good on TER I'll book a date, or at the minimum add her to my favorites list on p411.
Every date I've had the past few years has been from using the p411/TER combination. Its worked well for me. I make my initial contact by sending a pm on p411, that way all the provider has to do is to look at my profile and the Okays I've received and she can start her screening. In this regard I think p411 works very well for both parties.
The way I do it a provider not listed on p411 wouldn't be on my radar. Nothing against providers who don't use p411, but the formula of TER augmented by p411 has made the pre-date communications very easy and I am of the opinion that once the original communications and screening is accomplished the dates just seem to get off to a great start. p411 works great for me as an initial screening tool and once I back it up with the info I get on TER I feel pretty confident going into a session.
I used to do it in reverse. I used to browse the provider's profiles on TER and then cross reference them to p411. The problem with that is that there a lot of providers that have a TER profile but do not have a p411 link in their profile - even though that some of those without a p411 link on their TER profile do in fact have an account on p411.
Anyway, I know this was a little long winded but I thought I post a few of the things that have worked for me so any newbies reading this might get some ideas about how to align an approach of their own.
To answer the OPs question p411 is completely worth it, at least in my case, and an indispensable component of my routine in making a date with so many wonderful ladies in Las Vegas.