IB seems reliable, although I'm not on it all day. Sometimes...

IB seems reliable, although I'm not on it all day.

Sometimes there are issues with particular securities, eg some hybrids were untradeable for a while (they would always appear as closed) and the customer service isn't the best (my referral to the 2nd level help desk seemed to disappear into oblivion).

But I don't think they get overwhelmed on a large volume day on the asx, probably because at that time the US market is closed and the system is built to handle US volume levels.