It is not a good crypto exchange, thanks to the low trading volume there s a big spread between buy and sell price, so everytime you buy or sell, you loose a lot of money.
This is a liquidity issue and should be differentiated from being a good exchange. The exchange itself is very good, has good security and in case of any issues personally refund the customer out of their pockets. So the new management team is trying to get liquidity to prevent the spread by introducing negative fees last week. This will make a huge difference and allow the exchange to finally get some much needed volume. With an increase in volume the payout will increase and this will help the COS token grow fast.