Firstly, I had the same problem as the others. I couldn't find it. I had to close and reopen the document in order to find it. If you have this problem TRY IT.
Secondly, it is a little bit to slow because I have to copy the letters and paste them in the text. It would be more quick if the letter would be added in the text as you press it in the keyboard. It would be very useful if I could add some shortcuts for some characters ( like "alt+A" for a with ' on it, or something like that), but I don't know if it is possible.
Anyway, referring to French, it is better than adding a new keyboard in the computer, which differ to much comparing to the English keyboard.
Referring to German, it is easier to use the computer's keyboard.