PDF files are created by Adobe and their default opener it is Acrobat Reader. The advantage of documents for both professional and personal use makes it a widely used text format. The only way to avoid any compatibility challenges is when you have your PDF package from Adobe viewer. However, in most cases, it is impossible that is why we have an alternative which is the Adobe Reader XI.
The toolkit comes as a full package, with all viewing functions of the PDF documents. Although in some cases it is a bit slow in response, you will always find everything within the tool.
It is a freeware which is simple to download and install. Some other features of the application include an unlimited viewing of all PDF files even with graphical images, you can do formatting with a text editor to make comments. If you want to do a digital signature then the tool comes in handy as well as have online access to acrobat.com just within the interface.
Among all the other PDF viewer, it comes to be the best. The slowness, mentioned above is not something to keep you off. Just in case it is abnormally slow then ou device could have an underlying problem which affects its proper and faster functioning.