Adam demonstrated how I swam after he had got me to swim a length. He then demonstrated the Ocean Walker swim technique. We would meet once a week where Adam would identify my stroke issues. He would demonstrate swimming drills and expect me to practice these in my local pool before we met again. Many people had told me that I had a poor stroke (some had even said I had a good stroke!), but not many could tell me how to correct my stroke. Adam could. He can see what is wrong with your stroke then tell you how to correct it.
Apart from improving my stroke making me more efficient in the water, I think Adam and his technique has saved me from serious injury meaning I will be able to carry on swimming. I do not plough through the water doing 30 strokes per 25m any more, I now flow doing 20 strokes per 25m.