[nfnaaron]

Knowing whether I could generate anything more advanced than what was shown on the available worksheets stopped me from bothering to register. In other words, having to register in order to discover if "this is it or there's more" was an impediment to registering.

For example, my son is studying basic graphs and functions. y=3X + b. Would have been more likely to register if I had reason to believe I could generate worksheets for that type of work.

More generally, I saw no reason to register at all.

I liked the simplicity.

I also like the pdf generation, contrary to others. I liked seeing the results as-is immediately, and my browser (FF on linux) had no trouble opening the pdf for me in an external reader.

However, it would be nice to see an example graphic/screen shot somewhere: two thumbnails, leading to a worksheet graphic and its answer sheet.