How good is the divergence method ?

I have read a lot about the divergence method of detecting trend changes in a lot of tutorials. For example if price is in a downtrend and making new lower lows but some indicator, say stochastics is making higher lows, that is the trendline of the price and the trendline of the stochastics are diverging/converging, it indicates a change in trend.

Experienced users of this method please throw some light on the success of this method.

Thank you.