I like that you can make changes in real time without having access of your codebase which makes it easy for non-technical users as well! The interface could be more user friendly but other than this there are no issues with kalibrate cms so far!! We use KALIBRATE CMS mainly because we wanted our clients who were not technical people would have an easier way managing all aspects related web development projects they had been working upon since last few years using different technologies such us PHP/HTML5 etc., Also at times when client needed some work done by developer he used his own computer skills rather then relying too much into me (Developer).