When I went to Malia I spent a LOT of time on these, even playing against people for money. Got 999 loads of times, never got below a 950 on ANY machine (and I must have gone on 30 different ones minimum and probably had over 300+ goes), except when I tried nutting one
That is when I was doing thai boxing though and also could bench 140kg at the time so fairly strong. It is a LOT about technique though.
I ended up fracturing my hand and then going out in agony the next day, getting totally hammered, got into proper hero mode and bet 50 euro's against some dutch guys. I won but was almost on the floor with pain


I've tried to buy these and konami fighting mania before but with no luck.