A while ago, I downloaded a transcript of the 1911 census return of my grandfather's sister, to confirm the names of her children. Not only had FindMyPast got her name wrong - the page title was Ellen Phillips, and her name was Eliza, but they had also transcribed her son as being born when she was 13 years old. I thought maybe the son may have been from his father's previous marriage, at the time I wasn't too interested in spending any more time/money to find out.
Very recently I have made contact with the descendant of one of Eliza's children, so I decided to purchase the image of the 1911 census return, to see if it revealed anything about children who may have died. When I got the image, I found that her son was not 35, as shown on the transcript, but quite clearly 25. I was also able to see the number of children born & surviving.
In future, I am not going to bother to purchase transcriptions, because they are so innaccurate, that I have do end up spending another 30 credits to get the proper information, so I might as well get the images to start with, and save myself 10 credits on the deal. I'm really looking forward to the 1911 census going on Ancestry, because then maybe we'll get some decent transcriptions !