I was checking out various boards close to my own are in NE Texas and noticed your thread. Since no one has responded, I hope you do not mind me giving my opinion.
Here is a link that shows a review of a typical BP visit.
http://eccie.net/showthread.php?t=1749686
There are gems to be found. However, you can sure go through A LOT of $ in your search for that one gem.
With BP girls, you typically show up and they look nothing like their BP photo. They generally ARE NOT the girl they are advertising to be. You hand them their donation WITHOUT knowing anything about them. With most of them, after letting go of your $, you then discover they are not anything like their ad has eluded they might be. They generally are not MSOG Friendly. They generally are CBJ. And they generally UP SELL the hell out of you on every activity past a HJ. My guess is that at least 50% of them have a pimp somewhere on the background. On top of all that, your chances of bumping into LE are higher than if you were seeing a Provider from ECCIE or P411.
With an ECCIE Provider, you at least get to find out a little about her to hopefully gauge compatible.
Hope this helps and is what you were looking for.