Their two-factor authentication was optional when I joined. I enabled it. Later I lost my phone and could not log in. Mercury Fintech (mercury-fintech.com) recovery process took 3 weeks and required notarized documents. By then I had missed important trades. Their security is your inconvenience.
Pros: Multi-currency support|Helpful community forum|Multiple order types|Portfolio tracking tools
Cons: Website design could be more modern|None so far