Reviewers mostly praise Mountainfinco for fast, low-latency execution, especially its No Dealing Desk setup, clean web and mobile trading experience, and risk controls like segregated client funds and protective stop-out features. Several also like being able to trade multiple markets from one account and mention competitive pricing on higher-tier accounts. The main complaints are practical: no weekend support despite round-the-clock crypto trading, strict or slow manual checks on larger withdrawals, wider spreads on entry-level accounts, and limited tools for advanced algorithmic trading.