How do I use Goodreader to read a paper?

I have used my iPad for about 6 months, and one main usage is to read academic papers. My recent research interest include linguistics and computer science, and the format of CS paper are often two-column, so a powerful PDF annotation software is needed.

I tried Preview.app on Mac (not perfect, mainly for signing my documents, lol); and Skim (more robust than Preview, but still not perfect, b/c it cannot handle the two-column papers).

Luckily, I found Goodreader.app on iPad platform. So far, it is the most powerful PDF reader I've ever used, and the price is fairly reasonable.

Basically, I can show you some screenshots of Goodreader:

This is a very typical CS paper, ACM two-column formatted. If you use some other PDF software to highlight the text, they may occur some errors, because the software cannot recognise the right position of the text. However, here as you can see, Goodreader.app can perfectly identify the right row position.

This is a very old paper (written in 1957, and scanned by JSTOR later). It is not a typed PDF, but a scanned PDF, so it is really difficult to identify the text. Again, Goodreader.app can recognise them perfectly.  However, sometimes, when you export the highlighted text to other software, there are some formatting errors. This may caused by the imperfect OCR technology. Hope Goodreader.app will improve it.

Also, you can use Goodreader.app export you annotations easily (I recommended this to my boss and other friends, and this is the main reason they chose Goodread.app). You can choose email your annotation or original file to others in the right lower corner. For myself, I choose "Email Summary" to my Evernote account (you can find this in your Evernote setting if you have one). Then, the all the annotations will appear in my Evernote.

Because the exported annotation contains some metadata, such as the text position and annotated time, I need to clean them. Then I copy the annotations from Evernote to Vim (You can use any text editor you prefer, but Vim is really efficient).  With some simple regular expression, I can easily clean the exported annotations. Then I export the clean annotations to MoinMoin to build my wiki.

You see, with Goodreader.app, the procedure is quite easy. 

Take a try and buy it (do not tell me that you wanna jailbreak it. It is only $2.99, fairly cheap for such an awesome app!)

NB: Goodreader.app use annotated time as the index, so all exported annotation will be classified by the annotated by the time instead of the text position.