I had a dispute with Impersonation of STK Management Pty Limited (stkaccess.com and stkcorp.com); and went to their complaints process. They have an internal team that just defends the company. Then they said I could go to an ombudsman - but the ombudsman they use is industry-funded and rarely rules for the client. The system is rigged.
Pros: Wide product range|Comprehensive tools|Social trading features
Cons: Would like more payment methods