In its current version, Android still lacks support for PDF files out-of-the-box ( which is the same story for Windows XP, by the way...). IcViewer is a free solution for this problem. Surprisingly enough, it is completely functional and user friendly. The file manipulation options include Next and Previous page, Go to page and Rotate. There is also zooming, which works exactly in the same way as the Pictures Android app. That's all about it - no Search, no Editing, no Highlighting or typing in fields. Important - the app needs Internet connection every time when opens a file for a first time.
Worth installing? IcViewer is a must have app for the student and any other person who needs to view PDF files on a regular basis. It nicely complements Documents to go in the Office apps section. I haven't had any issues with it up to date.
What do I want to see in future versions? There should be an improved version soon with editing and saving enabled, as well as converting Office documents to PDF. I hope the app will remain free with all these extra features. For now, there is still plenty to enjoy.