Evaluating this commission structure is difficult without knowing the average number of trades per month and the number of shares per trade, but the ticket charge alone will make this not cost effective for most traders.
You should be looking at commission rate schedules similar to those you see onshore. The only caveat I would offer is that as the commission rates drop off, the services provided decrease. What may happen is you will get a great rate, but end up paying a data provider separately for dynamic quotes and charting. When you add your two costs together, you may not be ahead.
