Hi @dheiny, I think it is my favourite. And particularly suited to SimScale, I say this because it works well for both 2D and 3D and I feel in SimScale users tend to view at planes occasionally overviewing an iso. With OnShape cube you ca select a plane and then rotate to a different plane, some more simplistic cubes don't allow me to select the side plane when viewing the front plane say. or at least not as easily.
I haven't had much contact with the latest offerings from 3DS but I found the 3D navigation on CATIA very restrictive. I think the main features of the OnShape that will play the biggest part for SimScale is the rotate clockwise/anticlockwise along with being able to view every iso and planar view. I also reckon having a view opposite feature would be good. So to go from Front to back in one click would be great.
Hope this helps,