I have just aquired my 66 july this year[B1.3], been in industry almost 30 yrs in various roles did my modules over a 2 1/2 year period all self study mostly unaided and found it a really hard,long slog and at the end YOU must have the currency as specified by easa on type to get the elusive ticket. If he`s a&c 3,4,5 wil prove hard work and 10 is tricky but the elation of hearing the thud on the doormat of your part 66 licence is a moment to savour!!!