I first purchased the practice exams which I found invaluable in my actual microlight examinations. The bite size ground course had not started at that point but I bought the ground school when it came out to aid my study. It too was great, there were a few (lots!) of points where I was not sure I was comprehending the information correctly but with the use of the bite size course and with the lesson broken up into more manageable chunks I found I was able to understand and retain the knowledge. I am still to complete some of my exams but I will be relying on both the ground school and the exams as a study aid.