i hate setup!! here are some tips:
- if you can play the demos on phone, try update your tango phone.
- the latest sdk and tutorial(love it! https://developers.google.com/project-tango/apis/unity/unity-codelab-motion-tracking) is on unity 5(well at least i can make them work on 5), if you see some function in samples which not work on latest sdk, find it here: https://developers.google.com/project-tango/release-notes
- look this sample! i really like the ar project: https://github.com/googlesamples/tango-examples-unity also there is one bug. if you background it and open it again, the position will have offset.
- the project i like: tangoCubeStack, SpaceSketch, Measure it. still trying some others.