In my experience, it's not worth the trouble.
I find that Eye Fi works fairly well (and only fairly well), and can be fun and sometimes even useful, but not when you're trying it with a converter. Even without the converter it can be mind-numbingly slow with anything except smaller files, and I've often just thought, honestly, screw this, and I've tossed the Eye Fi card back into my bag. But I still have the card, and every now and then I pull it out and use it. Again, mostly just for fun. But I'd never even bother trying again with a converter. Too much trouble, not reliable.
Also, slightly off topic, I had some real problems and actually lost images when doing a standard download onto my laptop using the Eye Fi card reader that comes with the Eye Fi card. I now never use that card reader, in fact I think I've thrown it away.