This is one tool that I always use when I'm in need for my business, it's very easy to understand and manage all your campaigns at once with this software! There are no disadvantages about using them as they can help you improve any problems you have or may find out new ones while managing campaigns through their platform. The only thing which could be improved would probably be its UI / UX design (although not too much) so maybe some changes here will make everything even better. If you're looking for something simple but efficient then definitely go ahead with fusio because there isn't anything bad we've found yet (at least nothing worth mentioning). We used it mainly for our PPC advertising campaigns & reporting purposes.