Their two-factor authentication was optional when I joined. I enabled it. Later I lost my phone and could not log in. Unique Market Index (uniqumarketindex.ltd) recovery process took 3 weeks and required notarized documents. By then I had missed important trades. Their security is your inconvenience.
Pros: Multiple order types|No hidden fees|Regular platform improvements
Cons: No fractional shares|Wish they had more educational resources