i tried xsquawk, and nwow trying los, i noticed on xsquawk when the bell rings every 15 minutes in the pit it is about 3-4 seconds after the 15 minute interval on my IB console, with los its about 3 seconds behind, also los seems to use more people and everyone there has a different style, some are hyper and some laid back, so hard to judge the market a little that way. Xsquawk seems closer to the pit and you can really hit it in the background while los, seems to be further away and can't hear as good, after this trial is over will also try realtimefutures, adn then pick one. I really like listening to it during the day, at least there some noise in the house then