I think from what I have read, DTN IQ is more reliable than E Signal, but they don't seem to provide charts, or atleast I find nothing on their website so you have to use a charting package and connect to it like Sierra or Quote Tracker.
Come to think of it, I recall someone mentioning Prophet is owned by IQ I believe so there is your charting.
I never had problems with Esignal, I just think they are expensive for what they are.