I had a great experience with a DBT group. The facilitator was very well-trained in DBT and went through it herself as required. What she offered, though, was not the strict DBT. The concepts were DBT, but the structure was not as intense, which was most appropriate for those of us in the group. We covered all of the material in the modules and practice of the skills was an important part of the process, as was some sharing with each other. DBT helped me more than any other therapy I've received so far (and I've lost count of the number of Ts I've seen). I'd definitely recommend giving it a try and talking to your T to see what you'll be doing with her while also going through the group.