i tried it several years ago before the official DID diagnosis...but the therapist was not knowledgeable and scary and caused a lot of harm. i don't know how many times i even did EMDR with her....but it was a horrible experience.

my psychiatrist does EMDR, but she has said that for people with DID, it is generally not the best because of the fragmentation but that it can help people with PTSD who don't have the level of dissociation as those with DID have.

i would think though that if you kind of know more about some things like triggers, memories, alters, etc. and are in a safe place coping wise (no self harm, eating disorder, etc.) that EMDR could potentially help with some things though.

i would just make sure that the person you are doing it with really does know the process of EMDR to start with (and of course knows about dissociative disorders).