The ease of use as well speed in rendering results for complex scenes is very useful when working at high resolution (1-5m). It does not work perfectly yet but I believe it will keep improving over time! There was no such thing even close until now so this should be considered an advantage rather than disadvantage if there's nothing else out here that works better or faster either way. You can do almost everything using only one software package - processing images/data together then generating final maps etc., which cuts down considerably on your workload compared earlier where most people used 2 separate packages like ESRI ArcGIS plus Envi + Esri Airsar Pro Suite before version 10+.