I haven't seen it used. We did just have an election here in B.C. I was able to vote by mail. I have an autoimmune condition as well as a mobility disability, so I accessed that.
Not having seen it, I don't have that personal experience, but I have seen it work in other places. For example, when I was in Europe and I went to a museum, I didn't have to stand in the two-hour lineup, which might then have meant that I could do only one floor of a museum because of my disability. It's been done in other spaces, and I really hope that this is taken into account.