SO far i have no problem using HLE.
Quite happy with their service as normally i place orders 1 day before &
check the status on trading day.
Their execution is very fast in the morning session but afternoon session a bit slow.
I usually get my order matched in the morning and most of the time the first order itself which mean my order is placed right infront
but afternoon session i notice my queue is a bit far behind, sometime only get matched after a few transactions done.
Nevertheless, still happy with it.