I signed up for on-line faxing service MyFax today. I canceled my account the same day.

The biggest problem was that when I sent a fax, it came out as blank pages and not the actual document content. I called up tech support to ask why. They gave me some song and dance about the file I sent being too small (my first test was a 3K text file). This is a bullshit argument:

1. There’s no good reason to limit the file sizes above a certain amount.
2. I tried sending a 40K PDF afterwards and got the same result.
3. They don’t have any warnings about the file size being “too small” during the fax creation.
4. Their online fax preview system displays the file just fine

They recommended that I not use their web-based fax creation tool and instead send in faxes by email. Not only is that a hassle, insecure, and prone to error, but it shows that they’re unreliable (they can’t even get their own tool to work).

Two other nuisances:

1. Once you send a fax, you can’t un-send it. On my tests, I accidentally an incorrect number (a voice line). The recipient is forced to sit through 3 attempts at a fax call before it’s automatically canceled; there was no way I could correct my mistake.
2. The email address you use during signup is unchangeable; you’re stuck with it forever.

On the other hand, the billing cancellation process was hassle-free. Also, they allowed charges in both Canadian and US dollars, which was nice.