While interesting in its way, given its format and structure, one has to question the validity of the this site as a research tool. It always bemuses me that the same people who do not trust words printed on paper will trust words printed on the internet.
Taking some deserved flak lately for the rather liberal interpretation of academic credentials by some of its administrators, and by the dubious attempts at damage control by its CEO.
I find that Wikipedia is at its best around non-controversial topics, which don't attract too many vandals or nitwit revisionists. Even so, as a research site, its buyer beware.