This has certainly been improved in the latest releases but its still a sluggish old thing compared to Microsoft Office. However, the main one is that since it is largely based on Java, it can be rather slow and unresponsive particularly when opening new files. Occasionally, you will experience formatting or printing issues when using documents that have been made in Microsoft Office. There are some drawbacks to OpenOffice for Mac of course. The six components OpenOffice for Mac comes with are Write, Calc (spreadsheets), Impress (presentations), Draw, Base (database management) and Formula (mathematical application). It may not be quite as polished as Microsoft Office but considering you get all this for nothing, you really can't complain. OpenOffice for Mac includes the key desktop applications, such as a word processor, spreadsheet, presentation manager, and drawing program with a user interface and feature set similar to other office suites.