I love how easy it's to customize my models, using both Maya & Sketchup files as well! The UI has evolved over time but still feels intuitive enough that this isn't an issue at all now days with new users coming in daily via our app store or YouTube tutorials or even just Google search terms relating specifically towards "ZeaEngine".The best thing about ZEAnetwork so far - besides being able use any file format you like (even if they don’t have export capabilities)is their ability of importing multiple formats into one model without having separate meshes/geometry etc., which can become quite complicated when working across different software programs suchas sketchUp  vs MAYA /3ds Max/.
This also makes customizing your own assets much easier than other solutions out there since its.