I like how fast and lightweight it is, and the lack of visual clutter. Thank you for creating it and thanks to all contributors
You said it for me. I have signed up to this forum just to say a huge thank you to the author. I was getting so fed up with all the stuff around the edges of the the most commonly used pdf reader. Now I can run an application AND show the pdf help. This is exactly what I was looking for- it is like the author read my mind as well my pdf - very clearly without error.
It makes my own applications pdf help look good too - because you can see it alongside the application simultaneously. I will be recommending Sumatra PDF to my users without doubt. Its use of display space is wonderfully efficient and that is really appreciated, furthermore it is of very high quality and perfomance. It is the work of a perfectionist who enjoys their craft.