Yes, I've done it, truthfully can't remember what I scored, but it was below the indicated range for DID... which I don't have.
I also agree that the way the items are scored and rated lends itself to more variation, depending on how you're feeling/viewing your experiences at the time, than a lot of scales. For that reason, among others, there are more than the usual disclaimers that it is merely designed to indicate whether you are likely to benefit from further assessment for the presence of a dissociative disorder, as opposed to directly indicating whether you have one or not. And the flip side is that it has also been repeatedly proven that not all people with diagnosable dissociative disorders will necessarily score within the indicated range.
The most interesting part of the test for me when I did it was in learning about the common symptoms and indicators of dissociative disorders. The fact that I genuinely scored 0 on the majority of indicators seemed pretty compelling to me that I probably didn't have DID, though obviously there are still significant dissociative symptoms, and other dissociative disorders, that can exist further back along the spectrum.
In short, I found it interesting, but nothing to take as gospil proof of anything.
Maddog