I love that you can customize the pages to fit any size book! It's also great because they have different pricing options so if you're not sure which one will work best for you or what features are important, you can try them all without having to pay full price. You get what you pay for with flybook. They offer free basic trial but once you cancel within 7 days after signing up, there's no refund unless they think your website sucks (which never happens). If you want something simple like just getting paid online quickly and don't care about extra bells and whistles then this is perfect. We needed some way to track invoices and payments from clients as well as being able to send those same clients emails/calls at times when they aren't using the site. This lets us do both at the same time.