Customer service is top notch. Fast, friendly, helpful. Each time Fins went to phone only yesterday CS were online and working. In most cases spread is better than Fins also. Less margin and tighter control of positions, i.e. you cant run up large -ve balances as you can with Fins or D4F.
Platform is very stable.
FTSE quarterly contracts are an annoyance with CS though. Internet trading hours cease at 5.30.
Other than they are slightly ahead of Fins, who let themselves down on platform issues and mysterious 'technical problems'.