I've been using Microsoft Office on my Apple Macbook (Leopard, 10.5.7) for the past year or so, and I find that it has become quite slow and often unresponsive. I've been seeing these free alternatives, OpenOffice, and ThinkFree Office. Both seem really great; can you guide me in the area of which one to acquire? I'm looking for: Speed (Above All) Very Good, Clean and Simple Word Processing/Presentations Mediocre Spreadsheet capability (do not use much) And great Mac Compatibility. Opinions?