It is a crap shoot unless you have inside information from a friend that knows the VSO. If you have a very difficult claim I would suggest hiring a lawyer. Otherwise, you can use a VSO as a frontman, but you have to do the heavy lifting yourself. I use VSO's when I have hearings on issues that don't have thousands of dollars riding on the outcome. If you can organized your claim and get the VSO to present it that is an OK way to go IMO. If you were to just hand off your claim to some VSO that would be a loser.