I'm clearly preaching to those who are emotionally committed to spread betting rather than taking an objective view. not one person has come up with one advantage of spread betting over proper, dma access.
How about:
Lower stake (= contract size)
Lower margin
Guaranteed stops
No tax on profit
Smaller spreads (in some cases) and no commission
Ease of opening account
Dealing with company that will at least try to offer customer service and isn't on the other side of the world, with your funds