I just finished the survey. I had some problems with it, though.
1. I notice it says I need to have JavaScript to take the survey, but it seems to be accepting my answers anyway. (JavaScript makes my browser run about 10x slower.) When I turned JavaScript on, the survey stopped accepting my answers.
2. A lot of the questions used "gender identity" -- something I think of as internal and not directly visible -- when I would have expected "gender presentation" (e.g., whether my "gender identity" would prevent my getting a job) or "physical sex." Also, the fact that I don't feel like I have a "gender identity" as such made it hard to answer questions involving the term. I tried to reinterpret "gender identity" as "ways in which aspects of my personality mesh with cultural expectations of one gender or the other." It's too bad the questions didn't have a "not applicable" answer.
3. A lot of the questions seemed to be rewordings of previous questions; in some cases, questions from one page were repeated on the next.