I'm using the addon on MacOS, and I guess the only complaint I have, is due to restrictions Apple imposes on the user interface: Since the whole clock can only occupy only the space which is permitted for one single icon in the toolbar, the time HH:MM is formatted so that it fits into that tiny space. This means that "HH:" is in the top right corner of the icon space, and MM is in the top left, and the lowest pixel line of the "MM" is just outside of the space for the icon, making the minutes difficult to read.