The stable and best office application with all tools and options you will ever need.
This was the first version to use x format. like
docx, pptx, xlsx, etc.
These formats give you more loss less compression. old formats documents require more space. you would use a archive software to compress them about 80% of its original size.
But now, no need for that. if you save your file in X format, you have that winrar level compression automatically applied to them.
You can create more beautiful animations in power-points.