I had a dispute with Green Global FX (greenglobalfx.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: Economic calendar|Intuitive for beginners
Cons: Limited cryptocurrency options|Would like more payment methods