The best thing I like about this software is that it's very simple yet easy enough for anyone who has little knowledge of coding or HTML etc., It does not have any bugs as far i can see so there are no complaints from me at all! As long as you know how things work then everything should be fine but if your new than maybe take some time learning more before jumping into using haikus CMS because its fairly complicated when compared other cms out there (like wordpress).
Its pretty good tool especially since we were looking something which was both user friendly & had great support services too. We needed an online shop solution where our clients could upload their products without having access over FTPs/SSH connectionsetc..