Rachie,
I'm so happy to hear that you are going to be starting DBT. My DBT experience has gone pretty darn well. I've allowed myself to open up deeply a few times, and have not regretted it. Other group members have been supportive and kind throughout. A couple of members have come and gone, but that hasn't affected the core group. I guess we've all "clicked".
Hope that your DBT experience goes great Rachie!

Take care