I have been really pleased with the progress made so far, Logan happily does his lesson everyday.
He does not guess any longer but has occasionally taken to reading the word and as he has always been correct I have not stopped him. I have in fact taken this as a good sign. He 99 % of the time decodes all the words, and does so perfectly, i very rarely have any need to help him decode.
I am completely satisfied with the progress so far and would recommend anyone to use this system.