As is often the answer to questions like this, it depends. In this case, however, the answer may depend on how you define success. What are your measurement criteria? Just ending up with a signed Separation Agreement might be one, but in this video, I look at some other aspects of the mediation process that may also be valid reasons for success.
If you think that mediation is the process for you, check out my website — ClarePiroMediation.com.