Hi Kim,
There doesn't seem to be a minimum required for the efax and your toll-free number given is the same as your fax number, so that's handy. You can also do this: (no extra charge either!)
Your callers can help themselves to forms and printed information using our simple Fax-on-Demand feature.
You simply fax documents into your account, creating a library of documents that callers can request via fax instantly any time of day. Ideal for order forms, maps or anything else you want your callers to access on-demand 24 hours a day.
I had forgotten you could do this, cool! Some of the other features I didn't mention were you can set your hours of business for your lines. If they call you after hours, you can set a different message to be able to reach you alternatively. You can use your GotVMail to conference call, which could be very handy. Another use is if you receive a call at home from one of your extensions, you can put the caller on hold and transfer them to, say another VA's cell phone or even another extension.
Anyway, hope that helps!!