I took a trail on DTN.IQ to check out it's Eurex-data. I found the the feed to be reliable, however it lagged 1 to 2 sec''s in comparison with IB. TThey offer tick-data on the ESTX-50 as well. There also was a lag on the e-mini's of about 0.5 to 1 sec. in comparison with IB. On the e-mini's e-signal has been right on par with IB lately. My personal choice is e-signal/ensign for e-mini's and Sierra/IB for ESTX-50.