It may be just getting used to it. However, the box disappeared several times before I managed to get it to work. In the end, I just completed the top box and left the second box empty and this seemed to give me the same result that the old one gave.
The option to create a list does not work properly (IMHO)
When selecting a list to prefix each line with a bullet, the system does not apply a bullet to each line but only to the complete list.
If however, you then try and do each specific line as an individual list "[ li ]" then each line starts and ends "[ list ]" "[ /list ]"