I use Bullzip pdf, which is a free PDF printer. Digital signature and encryption seem to be valuable as might merging pdfs, but for most home users, I cannot imagine the need for such a product. This product seems aimed at a middle business market, costing less than full Adobe ($299 for 1 standard license), but for up to 5 PCs. Meh. For 5 PCs, I would go for the free Bullzip product.