First of all, I really like Indigo Studio ... I hope so see soon the new html5 version (Q4 - https://www.infragistics.com/products/indigo-design#roadmap)
There is 1 thing that is not clear to me.
Right now Indigo.Design desktop is now marketed as a free app for prototyping, but inside the app there are limitations that seems to be available on the Profession Plan (see screenshot) like Screenpart and Stylesheet.
These limitations are not documented/displayed on the pricing page ( www.infragistics.com/.../pricing )
The only limit refers to "Create reusable UI libraries in the desktop app and share with others" - but this is another thing. Is it?