Rated 4 out of 5 stars
Two requests, though:
1. Please enable opting-out the unread label in the hover popup. My 800x480 laptop only shows labels now.. (I have dozens of labels, but viewing them in a notifier context seems useless to me.
2. New popup for new mail is way too short to view. Even if I move back and forth in the list, mail switches to next message preview automatically after about 1 second.