I don't think they've quite hit their stride yet with the add-on services. I agree with the comments so far: It's not that difficult to organize your trove of legal documents in Google Docs, and I'd rather control my own hiring doc templates with a general-purpose tool like DocuSign than add another tool in the mix.
But the bigger picture here is the fact that they're releasing any such services at all. The chance of a traditional law firm releasing these services is zero, and there are software-based services I really want.
Personally, I'm waiting for the tool where I can declare my company policies around NDAs, and then use Atrium NDA (or whatever) to automatically scan the NDA I received, tell me how it violates my policies, and auto-generates a response to the counterparty.