I have not used one, but I have eaten
AGA cooked food at a demonstration at a kitchen/bath store a number of years ago (and heard my first Asko dishwasher), and yes, the AGA roasts beef brilliantly.
I don't think I would want one here in the States, but in a damper, colder climate, an AGA would be niiiiiice.
I would want the four oven one, in dark green.
The originator of the AGA was Gustav Dalen, he of the Dalen lighthouse. He was blinded in a laboratory accident, and was home, and was listening to, and talking to his wife as she struggled with the stove she had at the time. He invented the AGA as a gift to make kitchen life better.
I suppose an AGA might be somewhat easier for a visually impaired person to use than a more typical stove, but I would wonder.
Lawrence/Maytagbear