I've used it, and other census - eg the 1851 one and so on. You can access all these by subscribing to a genealogy website like ancestry.co.uk (they're actually based in the US, I think, despite the co.uk suffix). For a low monthly fee you can access all these records and lots more, and it's helped me make good progress in my own researches. Years ago you'd actually have to go in person to the repositories to examine the records - time consuming and often disappointing unless you were quite sure what you were looking for. Viva la Net!