I tested Ubuntu with it, and it works great!
Run the program, select the Ubuntu version you want to boot and it goes by itself.
It's a bit like the HQ Flash tool, but less smart, as it downloads all the time
This is great for Linux; you can just put the most recent ISO on the drive instead of burning a new CD very couple months when they release an update. Also makes it possible to store files and use Live OS on a computer with HDs.
This program is great and actually just saved a brand spankin new MSI GX660 from certain death, I had it packed and ready to ship back to newegg hours after I got it because recovery would not work. But a fresh win 7 iso image and a 4gig flash drive and unetbootin saved my laptop and weeks of certain stress.
All I wanted was my GX660 to run out of the box and unetbootin assisted in the processs immensely!