The mechanism to bring the data to the screens has been upgraded a few months back and feedback (on this site and from clients) has been excellent. I can't speak for level II as I don't use it or believe it is worth much and others will have to comment on that.
I don't recommended their L2 data, because too expensive and not very usefull in their environnement of TWS. The data of L1 are quickly delivered at the TWS, sometimes faster than the most data providers.
I don't recommended their L2 data, because too expensive and not very usefull in their environnement of TWS. The data of L1 are quickly delivered at the TWS, sometimes faster than the most data providers.