We use formax for our invoices as well because we print business cards with it too! I like that you can choose different paper options if needed or just go to one of their samples so its very easy when ordering from them. That they have been around forever is great but sometimes there are mistakes made during installation which makes things more difficult than necessary. This has not happened since i started using this software though. It saves time because everything prints at once instead having multiple files printed manually through other programs such as Microsoft Word etc.