Just came across this on Youtube. It’s over a year old but has a good shoot out between these 3 units in the places they would normally get used.
I use a Zoom H2 a lot and have been considering the PMD620 as a replacement as it has similar features (AA batteries and small being my main requirements) but this video highlights some show stoppers for me – unable to adjust recording volume during recording and similar handling noise for twice the cost.
I’ll stick with the H2 for now as my most portable unit and look at some of the newer units from Tascam.