Php-fusion - Review

I recently installed fusion on one of my subdomains cause I heard some really nice thing about it. But I was really disappointed. I sticked with it because I was too lazy to install something else but it's way more weak than other CMS like MkPortal or Dragonfly.
It's good thing that the fusions are easy to install but when it comes to organizing it sucks big time. It has absolutely no support for sub-categories.
To me, it was a huge disappointment. How about for you? Has someone else used it too?