The biggest drawback is the limited range of tradable instruments; Himawari only offers currency pairs and does not support commodities, stocks, or cryptocurrencies. Additionally, the spread for EUR/USD is 2 pips, which could be considered high by some traders, especially for frequent trading. Another limitation is the lack of support for MT4 or MT5, which are popular trading platforms for more advanced traders. For me, these limitations make it less appealing compared to other brokers offering more diverse options.