I hope you dont mind if i have a go at answering this, im a bit of an idigo fan myself.
Basiaclly it has most of the features youd find in maxwell, and a better interface with SU than maxwell. Materials setup is very simple in most cases, although ti still has the ability to do very compex things like SSS and displacement.
Whaat (the exporter developer) is also very active in developing new plugins to keep us up to date with the altest goings on.
And best of all it's free!