As to Ancestry.com I'm both pleased and angered. When you subscribe it is on an annual basis, pay up front. But about 2 months into it they now say the state censuses require an update (and $40). So I can no longer see the 1885 Colorado State census.
But I am extremely pleased with the scanned images and what indexes they have. They don't have indexes to the 1900 and 1910 but I'm told Genealogy.com has them (I know they exist). So maybe now that they are all one company they'll add them together.
I got all the census records for ancestors years ago. But I'm also trying, on a few lines, to bring all descendents down to today. So there the census records are invaluable.
And whenever I discover "new" children or siblings again the census are proving great.