I visited Malmö ATCC (Sweden) a few weeks ago, and joined a few pairs of controllers while they worked... They got a new system a few years back, and praised it like nothing else.... I think what they fancied most was "prediction lines" going along their A/C's ATS-routes (from FP)... Then if lines from two different a/c crossed further on, and the system expected that one of them had to climb/descent through the others level, then the intersection would be yellow, and one would get a "potentially conflict alert" (maybe 10-15 minutes ahead)... If one of the a/c by accident got a actual clearance to climb/descent through the others level, then the alarm would go off.... Completely stripless environment, and they semt very, very happy about it...