Reviewers mostly praise Mountainfinco for fast execution, a no-dealing-desk setup, and low trading costs, especially for larger or more active trades in indices, energy, currencies, and shares. Several say the web platform feels lighter and more modern than traditional brokers, with useful touches like TradingView integration, unified access across markets, and risk controls such as the 10% stop-out level. The main complaints are practical: no dedicated mobile app, no built-in tools for advanced trading automation, limited weekend support for crypto trading, and slow manual reviews on large withdrawals or transfers.