..your welcome Stefan...
few months ago they gave a demo -version and some ready-to-use scenes for testing,suddendly changed a lot of things:
quit Fryrender,no more support for all plug-ins(MAYA-C4D MODO-SKETCH UP-RHINO-LIGHTWAVE etc..)new pricing and licensing
Fryrender is still on the top with Maxwell,give faster results but belongs to a small company
this means an heavy work for the programmer to update all plug-ins to the last releases(like in C4D,they changed all from 11.5 to 12)
if i remember correctly,i have read on their forum in the past,programmer that worked on the plug-ins left the company
then,probably, they decided to continue development Arion without supporting all plug-ins, just MAX and XSI
they give - Arion sdk -for sale if someone want to develope a Live plug-in(i hope that this happens in future)
you can imagine how fast will be in the next future render with newest CPU and GPU's getting an unbiased quality
so you also will render animations to that quality,but no live plug-in,no animation
maybe you would consider which application give these features,before buying(if you need that features)

M