They essentially do what they say they do. Howeve...

They essentially do what they say they do. However, they are not really the negotiators they claim to be. They are essentially order takers governed by an auto-response program that doesn't allow these order takers to even know your case when they call you with updates. Their system doesn't really allow them to act based on unique information about your case. Having said all that, their service is legitimate. They are at least accomplishing, albeit a bit expensively, what I ask them to do for me.