The 1841 census of England and Wales was the first to record names rather than just numbers. It therefore helped later researchers enormously, adding to the huge records boost given by the compulsory registration that started in 1837.
One thing to watch is the ages. Enumerators were instructed to round down adults' ages to a multiple of 5. Not all of them did, fortunately.
This page is a "stub" and could be improved by additions and other edits.