I like that it's open-source, flexible tool for web application testing - no need to have any special skills or tools installed in your machine (no software needed). It can be used without installing anything so you don't get an additional cost of licensing etc., if there is one at all; everything comes as free with this package! The setup & configuraton process could've been more intuitive though but still nothing too serious from my point of view. Maybe some kind of tutorials would helpβ¦