I had a dispute with Unknown (Misrepresentation of the trade name, such as "Cook Pine Capital LLC") 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: Intuitive for beginners|Easy withdrawals
Cons: Wish they had more educational resources|No integrated tax optimization