I like how easy it is to use for both subcontractors as well as clients! The customer service has been great too - they are always quick with an answer or willing to help you out when things get tricky (like my last job).
There's not much dislike about this program so far but there might be some if your looking at using more than one person in running jobs through runjob. We have found we can easily share files between multiple people without having issues of losing work/files etc because everything gets saved into our own cloud storage folder which allows us access from any computer no matter who logged onto what project.