Well, I've have TrustFax for over a month.
I tried the 30-day trial period, which really isn't much of a trial. You only get to send 5 pages outbound. But okay. And they want your credit card. So they automatically started charging my credit after the first 30 days, which I kinda didn't like.
I talked it over with my husband, and we consider it a business expense. I do do some faxing. And it's only $4.95/month to send out 50 pages and receive a hundred.
How it works. You scan the pages you need to send out. Then you upload the pages to their fax server. If you've got a lot of pages and a slow server, this can be a cumbersome process. Also, I realized, if you've scanned them and you know your parties e-mail, you might as well e-mail the pages to them.
But it's helpful for people who need to fax stuff to you. And if you've only got a one or two-page fax.
I guess I'll keep it for now because it's the cheapest I've found, and I guess I do do some faxing. But I think I'll keep looking around sporadically for something cheaper. Mayber a per-use fax service.
Oh, btw, I've sent about 17 pages of faxes to different phone numbers, and they've all gone through without a hitch. So the service is reliable, as far as that goes.