Which iPad do you have, Katie? Even though they aren't HD I find on my iPad 3 that the text is sharp and the videos are pretty good even though they aren't HD.
I do use Good Reader because I'd rather not sit in my computer room chair at the computer. I used to print patterns all the time, but now I can see many (not all) of them right on my iPad. I'll probably be PDFing patterns now so I can use them on there! Can't wait to use the test the annotation since I always use a pencil and paper or write on my patterns.