pretty good. ive been using it for a while and has been largely accurate. im not sure the specifics of the process. but as of late it seems false negatives within the system have been circulating just for people combating transmisogyny. one thing that would help is when somebody is marked red or green (though it would benefit red marks the most) it gives a reason why they were marked such and a link/screenshot to where the person expressed a belief which way. don't use it without checking, especially for red marks, but it can help bring your attention to whether or not a person might be transphobic