I also tried to learn butterfly with this program. For me it didn't work at all.
I wasn't able to connect the arm movement with the body dolphin.
I at least learned butterfly with the DVD "Betterfly for everybody". The concept is different. You first learn the idea of the dolphin movement, then, very early you learn the arm stroke to assist the dolphin. The arms help to do a fluent body movement and find the correct timing, not the other way round.
I began about 11 month ago (without anyone to coach me and with training about once a week) my butterfly is going quite well.