- Takes less than half the time to format a full document - Where possible only the required lines are re-parsed when text is changed (was the whole file, for every key press!) - Memory is allocated in one place only (there were all sorts of problems here) - Should be easily extensible for other scripting languages - Lots of comments to make it very easy to follow / change - def and class are now properly coloured. They had a theme colour but the checks didn't work.