I really wanted this to work, and it WAS remarkably good, but palm rejection on the (ginormous) Apple trackpad didn't work at all, rendering the whole thing unusable if you ever typed anything. That was a month ago, this article is a year old. I'd love to be wrong, but I don't think this problem has been solved.

Yeah what is up with that? When I've tried to look into it I've just been met with statements that palm rejection should pretty much just work, but it absolutely doesn't and accidental inputs are so bad it's unusable without a disable/enable trackpad hotkey.