Review of FaxDocument

I am new to this app, but I was not too happy to download a "free" app only to learn that in order to actually use it, you needed to purchase a package. I feel like that is false advertising and would never really be accepted in the real world of retail.
Also, if I can send and receive a fax, how does that work exactly? Do I can people my email address or a number?
Other than the above, I like how you can pay as you go instead of purchasing a monthly plan as a do not need to fax very often.

Those are my thoughts on this app as of now.

Courtney Hartleib about FaxDocument, v2.3