the emange is a interceptor type ECU, tuning is done via a laptop which is linked with what seems to be a 9pin serial <-> USB cable.
software is not bundled with the unit and needs to be purchased seperately.
16 x 16 (load vs RPM) in the basic package, much like a SAFC except this is load vs RPM.
Easy/Hard to tune? Dude that depends how competent YOUR tuner is...
What else do you need to know?