All right. This one installed smoothly, and seems to work.
It was not quite what I expected, though.
I figured it would give you the option of replying to all, instead, it forced you to reply to all. Sometimes, you are going to want to reply to all, but other times, perhaps not.
My thoughts (and I understand you may disagree) are that one is almost as likely to not want to reply to all on a particular message, as to do so. I was expecting an extra button, reply to all, or perhaps a check box.
Even if that was not present, I would have expected at least the ability to remove people from the reply to list ... but it doesn't seem like you can. (Or at least if you can, I could not figure out how.)
Again, you may totally disagree ... but these are the thoughts I had while testing this. May I ask for your thoughts on my thoughts?