Great, loving it!
--For autohide/slide stuff, I don't know about other people, but I hate the delays associated with them (on any program). I prefer to set any kind of delay on the slide-out, slide-in to 0. Meaning, as soon as the mouse goes there it appears, and as soon as the mouse leaves, it disappears. No delay. But that's just me. It's probably best to make it one of those millisecond options. Autocad does this and despite me mailing them for 3 years, they've never provided the option for it. To make it worse, with each new version, they move more and more dialogs to a slide-out thing. So I have to deal with a million slideouts all the time, and I always have to wait a few milliseconds while everything disappears...it's a little annoying. I know, I know, who cares about a few milliseconds, right? But eveything in Autocad is done so fast, it makes a difference. And I'm just crazy like that.
--Also, it doesn't look like you fixed the thing where if you trigger the menu to appear and don't want to select anything, it doesn't disappear. At least have the ESC key get out of it, but ideally you want to click elsewhere and the menu goes away.