I love Jumpshare's simplicity. It doesn't have all of the useless bloat of Loom and it doesn't force me to login every other day like Zight does. Jumpshare lets me easily share files very quickly. It's super reliable.
Apparently Jumpshare hasn't heard of Linux, so they keep bugging me to install the windows or mac application. And BTW, some people don't want extra application on their computer. It's filesharing!