Yes, I've been doing ACT since before last Christmas, so maybe seven or eight months?
I found it annoying at first - having to accept all these intrusive thoughts and feelings, that I couldn't just *snap* get rid of them. But it's been useful.
Things like "naming your stories" (the "I want to die" story, etc.) and recognising your thoughts as they are, and that they aren't a label of who you are.
Right now, I'm working through what's called the Bullseye, lining up my actions with my values. Do I value my education? Yes. So I go to school. Do I value my health? Yes. So I eat.

It's been really helpful in allowing me to discover who I am, away from my mental health problems. I feel like I lost sense of who I was, and I'm definitely getting closer to being "me" through ACT.
And my therapist is an angel, so.