Sorry, but I can't agree with these glowing reviews. I'm an experienced user on a good, clean installation of 10.3.2 on a G4 1.25, and I could not get this sucker to receive a fax in a half hour. I observed at least four distinct eye-roller, what-the-hell-now behaviours along the way.
I suspect that I could probably get it working if I spent a couple hours at it. But the software has already FAILED by then, you know? Some functionality has to be immediate to be worthwhile. If it doesn't work right away, it basically doesn't work.
What is it about fax software, anyway? There must be complexities I know nothing about. Apparently it's a very difficult thing to do, because in ten years of trying I have yet to use fax software that I could trust. I expect Ben Mackin is a fine developer (he's certainly put together a nice interface), yet he is not, apparently, able to make fax software that just... works. I'm beginning to think that no one can.
My solution: I'm going to give up faxing. It gets less useful every year anyway.