Just bought this, and there's a big problem: the filters won't let you choose a destination directory that's not in your Home directory! I'm not sure if this is a weird Sandboxing constraint or not? But I keep my Downloads folder on a SD card[1], so the app is currently useless for me (sadly!).
Question for the dev: any plans to fix this, or should I contact Apple for a refund? If it's a permanent restriction, I'd suggest putting a notice in the App Store description.
[1] https://www3.pny.com/category_buymulti.aspx?Category_ID=591