I spent a month evaluating all the PDF display tools on the market, and this was the one I finally settled on. It has a simple user interface, some great examples (both in C# AND VB) and the company has good support. I haven't found a PDF file yet that didn't display or print correctly. Although you can do a lot of the same things with the standard Adobe Acrobat Reader, printing is a hassle and this component makes doing form fillout very easy.