Its interface is functional and efficient, but that can be a benefit as a basic reader app does not require a lot of fluff. When you launch PDF Reader X for the first time, you'll immediately notice the UI, which is not as polished as some OS X apps. If you are looking for an alternative that takes up less space and is easier on your computer, then you should check out PDF Reader X. Adobe Reader may be the most popular option for reading PDFs on your Mac, but the 77 MB app is far from being lightweight and nimble.
