This program is more than just a PDF reader. With its help, you can also add annotations to your documents, fill PDF forms, print them with just a few clicks, extract pages, and save them as image or text files to your local directories.
The app's main window is very intuitive, brings you the multi-tab feature, and offers you various reading modes. It also provides you with various PDF editing options which are listed on the main toolbar of the application and are very simple to configure.
Unfortunately, the number of useful features is quite limited. The only way to have access to additional features is to upgrade this application to its Pro version. Afterwards, you can manage as many window tabs as you like, add an unlimited amount of annotations to your PDFs, etc.
Another disadvantage is that the program supports only 3 output formats when exporting your edited PDFs: PDF, JPEG, and TXT.
To summarize, you can find better solutions for reading, editing and converting your PDF documents. There are plenty of Mac programs that provide you with more useful editing options, support various output formats, and cost as much as PDF Reader X or even less.