Thank you. I know that :] ... but it is not all about the looks. Is it easy to understand/use/integrate? Do you think it is well designed/extensible/developer

Thank you. I know that :] ... but it is not all about the looks. Is it easy to understand/use/integrate? Do you think it is well designed/extensible/developer friendly? Too many questions.. unanswered. Anyway, thanks for your comment :]