This is a good tool, and I have used it many times myself, however its unfortunate that if the Linux Distro your trying to install to a USB is not included in the lengthy drop down of distro versions to select from, and you try to use the Other Linux option, I haven't had any luck with getting any Other Linux distros to work with that option.
If you are using a more common Linux Distro to push to USB stick it works very well.
It may have been Morphix that gave me problems.