It's really easy to use, it has lot of plugins which help me in building my project without any issue or mistake! I have been using this software for almost 2 year now but i can't say anything bad about its features because everything is perfect as expected from such good softwares!! Definitely try out if you are looking forward your own CI / CD solution with proper source code management system like Git etc., all things will be awesome.
My main problem solved by quickbuild was that how we could manage our projects easily through different environments (Dev - Staging & Production) where there were multiple developers working together at same time so here comes QBUILD into picture who helped managing each environment separately along their respective branches within single git repo itself!