A blog was posted on 10 April 2014, about a senior Microsoft Assistive Technology staff member. He helped two dyslexic workers, but he learned about the software for his own benefit, as well as showing it to them.
One worker chose ClaroRead and the other chose Read & Write. That underlines our view that there is no single best program for any task.
They both personalised the font in MS Outlook and MS Word to blue Comic Sans and double spacing, but again, that would not suit everyone.