Can build anything assuming you are willing to make few compromises. Or you can always buy pro elements.
Ease of use
Once you understand the logic, or rather absence of it, it's not so bad.
Supp-what? You are on your own. Lack of documentation and support would be the reson for me to give up on it if I'd have to start again.
Outdated and mostly written in confusing manner lacking crucial details.