Depends on how you want to use it. If you are happy to use it in their sw and don't need live data, then their $25pm delayed intraday data is pretty unbeatable value - it's called Esignal On Demand.
But if you want to take the data out and use it in other programs than you'll have to have the standard service, Premier i think it's called? Costs £125pm i think... at that price otehr provdiers look much better!